{"title":"Pen Refills","description":"\u003cp\u003eResearch peptides reconstituted and prepared as cartridges ready to insert into a peptide pen. Independently third-party tested for HPLC purity and mass-spec identity. Supplied strictly as laboratory research reagents — not for human or veterinary use.\u003c\/p\u003e","products":[{"product_id":"bpc-157-pen-refill","title":"BPC-157 Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eBPC-157 — The Healer Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports tissue healing\u003c\/li\u003e\n\u003cli\u003eReduces inflammation\u003c\/li\u003e\n\u003cli\u003eProtects gastrointestinal tract\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eBPC-157 pen refill cartridge, supplied ready to insert into a peptide pen. Available in 5mg and 10mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 5mg and 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e BPC-157 — \u003ca href=\"\/products\/bpc-157\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eBPC-157 is a synthetic pentadecapeptide based on a partial sequence of a protein found naturally in human gastric juice, and among the most widely studied peptides in tissue-repair research. Published work has examined tendon, ligament and muscle repair, gut mucosal integrity and protection of the gastrointestinal lining, angiogenesis, nerve regeneration, and interaction with the nitric-oxide system.\u003c\/p\u003e\n\u003cp\u003eResearch on BPC-157 is predominantly in animal models and in-vitro studies; human clinical data is limited. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/bpc-157-dosage-research\"\u003eBPC-157 Dosage: What the Research Has Investigated\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"5mg","offer_id":53516003311944,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true},{"title":"10mg","offer_id":53516003279176,"sku":null,"price":40.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_be65d631-dfcc-4c14-9ffd-e90cb6cbcda7.jpg?v=1784157455"},{"product_id":"bpc-157-tb-500-blend-pen-refill","title":"Wolverine Stack Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eWolverine Stack — The Recovery Stack\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCombines BPC-157 and TB-500\u003c\/li\u003e\n\u003cli\u003eSupports tissue repair\u003c\/li\u003e\n\u003cli\u003eTwo repair mechanisms in one cartridge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eWolverine Stack pen refill cartridge — an equal blend of BPC-157 and TB-500, supplied ready to insert into a peptide pen. Available in 10mg and 20mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 10mg and 20mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e Equal parts BPC-157 and TB-500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e Wolverine Stack — \u003ca href=\"\/products\/bpc-157-tb-500-blend\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eThe Wolverine Stack pairs two peptides studied in tissue repair by different mechanisms. BPC-157 has been examined for tendon, ligament and muscle repair, gut mucosal integrity and angiogenesis. TB-500, a synthetic fragment of the naturally occurring protein Thymosin Beta-4, has been studied for actin regulation, migration of repair cells to injury sites, new blood-vessel formation and cardiac tissue repair.\u003c\/p\u003e\n\u003cp\u003eResearch on both compounds is predominantly in animal models and in-vitro studies; human clinical data is limited. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/tb-500-dosage-research\"\u003eTB-500 Dosage: What Studies Have Actually Investigated\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"10mg","offer_id":53516003377480,"sku":null,"price":40.0,"currency_code":"GBP","in_stock":true},{"title":"20mg","offer_id":53516003344712,"sku":null,"price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_4e1da426-85cc-4726-92e4-7fd00791ddac.jpg?v=1784483393"},{"product_id":"ghk-cu-pen-refill","title":"GHK-Cu Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eGHK-Cu — The Beauty Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBoosts collagen\u003c\/li\u003e\n\u003cli\u003eTightens skin\u003c\/li\u003e\n\u003cli\u003eImproves hair health\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eGHK-Cu pen refill cartridge, supplied ready to insert into a peptide pen. Available in 50mg and 100mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 50mg and 100mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e GHK-Cu — \u003ca href=\"\/products\/ghk-cu\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eGHK-Cu is a copper tripeptide — glycyl-L-histidyl-L-lysine complexed with copper(II) — found naturally in human plasma, where its concentration declines with age. Published work has examined collagen and elastin synthesis, skin remodelling and wound repair, stimulation of hair follicles, antioxidant activity, and broad modulation of gene expression.\u003c\/p\u003e\n\u003cp\u003eResearch on GHK-Cu includes human topical studies as well as animal and in-vitro work. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/ghk-cu-dosage-research\"\u003eGHK-Cu Dosage: What Studies Have Actually Investigated\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"50mg","offer_id":53516003443016,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true},{"title":"100mg","offer_id":53516003475784,"sku":null,"price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_cc0c1961-a794-49dd-8a3a-bedea2628c23.jpg?v=1784157552"},{"product_id":"glow-blend-pen-refill","title":"GLOW Blend Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eGLOW Blend — The Skin \u0026amp; Repair Blend\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCombines BPC-157, GHK-Cu and TB-500\u003c\/li\u003e\n\u003cli\u003eSupports skin and collagen\u003c\/li\u003e\n\u003cli\u003eSupports tissue repair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eGLOW Blend pen refill cartridge, supplied ready to insert into a peptide pen. Available in 70mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 70mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e BPC-157 10mg, GHK-Cu 50mg, TB-500 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e GLOW Blend — \u003ca href=\"\/products\/glow-blend\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eGLOW pairs two peptides studied in tissue repair with one studied in skin and collagen research. BPC-157 has been examined for tendon, ligament and muscle repair, gut mucosal integrity and angiogenesis. TB-500, a fragment of Thymosin Beta-4, has been studied for actin regulation, cell migration to injury sites and new blood-vessel formation. GHK-Cu, a copper tripeptide found naturally in human plasma, has been examined for collagen and elastin synthesis and skin remodelling.\u003c\/p\u003e\n\u003cp\u003eResearch on BPC-157 and TB-500 is predominantly in animal models and in-vitro studies; human clinical data is limited. GHK-Cu has additionally been studied in human topical trials.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"70mg","offer_id":53516003508552,"sku":null,"price":65.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_d7aba5b9-977c-4b9a-a9c4-8a975558980c.jpg?v=1784483503"},{"product_id":"klow-blend-pen-refill","title":"KLOW Blend Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eKLOW Blend — The Complete Repair Blend\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCombines BPC-157, GHK-Cu, TB-500 and KPV\u003c\/li\u003e\n\u003cli\u003eSupports skin and tissue repair\u003c\/li\u003e\n\u003cli\u003eAdds inflammatory support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eKLOW Blend pen refill cartridge, supplied ready to insert into a peptide pen. Available in 80mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 80mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e BPC-157 10mg, GHK-Cu 50mg, TB-500 10mg, KPV 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e KLOW Blend — \u003ca href=\"\/products\/klow-blend\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eKLOW takes the three peptides in our GLOW Blend and adds KPV. BPC-157 has been examined for tendon, ligament and muscle repair and gut mucosal integrity. TB-500, a fragment of Thymosin Beta-4, has been studied for actin regulation and cell migration to injury sites. GHK-Cu, a copper tripeptide found naturally in human plasma, has been examined for collagen synthesis and skin remodelling. KPV, the C-terminal tripeptide fragment of alpha-MSH, has been studied for anti-inflammatory signalling and in models of intestinal inflammation.\u003c\/p\u003e\n\u003cp\u003eResearch on BPC-157, TB-500 and KPV is predominantly in animal models and in-vitro studies; human clinical data is limited. GHK-Cu has additionally been studied in human topical trials.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"80mg","offer_id":53516003541320,"sku":null,"price":75.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_1c9266dc-51da-497d-b46c-b5eae2094bb4.jpg?v=1784157397"},{"product_id":"mots-c-pen-refill","title":"MOTS-C Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eMOTS-c — The Mitochondrial Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports metabolic function\u003c\/li\u003e\n\u003cli\u003eActivates AMPK\u003c\/li\u003e\n\u003cli\u003eSupports exercise capacity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMOTS-c pen refill cartridge, supplied ready to insert into a peptide pen. Available in 10mg and 40mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 10mg and 40mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e MOTS-c — \u003ca href=\"\/products\/mots-c\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eMOTS-c is a 16-amino-acid mitochondrial-derived peptide, encoded within the mitochondrial 12S rRNA gene rather than in nuclear DNA. It is studied primarily as a metabolic regulator: published research has examined its activation of AMPK, the cellular energy sensor; insulin sensitivity and glucose metabolism; exercise capacity; and mitochondrial function during ageing.\u003c\/p\u003e\n\u003cp\u003eResearch on MOTS-c is predominantly in animal models and in-vitro studies; human clinical data is limited. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/dosage-cycle-information-ss-31-mots-c-and-nad-what-published-research-actually-shows\"\u003eSS-31, MOTS-c \u0026amp; NAD+ Dosage: What Studies Show\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"10mg","offer_id":53516003574088,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true},{"title":"40mg","offer_id":53516003606856,"sku":null,"price":75.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_1494d51c-33eb-42c4-812d-8b46e0c115f7.jpg?v=1784470530"},{"product_id":"retatrutide-pen-refill","title":"Retatrutide Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eRetatrutide — The Metabolic Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports weight reduction\u003c\/li\u003e\n\u003cli\u003eSupports glycaemic control\u003c\/li\u003e\n\u003cli\u003eReduces hepatic fat\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eRetatrutide pen refill cartridge, supplied ready to insert into a peptide pen. Available in 20mg and 40mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 20mg and 40mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e Retatrutide — \u003ca href=\"\/products\/retatrutide\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eRetatrutide is a triple agonist, acting on the GLP-1, GIP and glucagon receptors simultaneously where earlier compounds in its class targeted one or two. Published Phase 2 trial results have examined body-weight reduction, glycaemic control and hepatic fat content, with the triple-receptor mechanism reported to produce greater effect than single or dual agonists. Phase 3 trials are ongoing.\u003c\/p\u003e\n\u003cp\u003eRetatrutide has been studied in human clinical trials. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/retatrutide-dosage-research\"\u003eRetatrutide Dosage: What Studies Have Investigated\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"20mg","offer_id":53516003901768,"sku":null,"price":75.0,"currency_code":"GBP","in_stock":true},{"title":"40mg","offer_id":53516003934536,"sku":null,"price":135.0,"currency_code":"GBP","in_stock":true},{"title":"60mg","offer_id":53877468561736,"sku":null,"price":210.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_c41911ad-36a4-49b1-981b-914b3f7cc844.jpg?v=1784158524"},{"product_id":"selank-pen-refill","title":"Selank Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eSelank — The Calm Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports calm without sedation\u003c\/li\u003e\n\u003cli\u003eInfluences GABA signalling\u003c\/li\u003e\n\u003cli\u003eSupports focus under stress\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eSelank pen refill cartridge, supplied ready to insert into a peptide pen. Available in 10mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e Selank — \u003ca href=\"\/products\/selank\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso available as:\u003c\/strong\u003e \u003ca href=\"\/products\/selank-nasal-spray\"\u003eSelank nasal spray\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eSelank is a synthetic heptapeptide analogue of tuftsin, developed in Russia and also known as TP-7. It is studied chiefly as an anxiolytic, and what distinguishes it in the literature is that research reports anxiolytic activity without the sedation, cognitive dulling or dependence associated with benzodiazepines. Published work has examined its influence on GABAergic signalling, expression of BDNF, inhibition of enkephalin degradation, and attention and memory under stress conditions.\u003c\/p\u003e\n\u003cp\u003eResearch on Selank includes both human clinical studies, largely published in Russian-language journals, and animal models.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"10mg","offer_id":53516004000072,"sku":null,"price":35.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_0ca46863-0cb0-4d37-b32f-26de49144d88.jpg?v=1784392901"},{"product_id":"semax-pen-refill","title":"Semax Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eSemax — The Focus Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports cognitive function\u003c\/li\u003e\n\u003cli\u003eInfluences BDNF and NGF\u003c\/li\u003e\n\u003cli\u003eNeuroprotective in research models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eSemax pen refill cartridge, supplied ready to insert into a peptide pen. Available in 10mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e Semax — \u003ca href=\"\/products\/semax\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso available as:\u003c\/strong\u003e \u003ca href=\"\/products\/semax-nasal-spray\"\u003eSemax nasal spray\u003c\/a\u003e — the route used in most published Semax research\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eSemax is a synthetic heptapeptide analogue of the ACTH(4-10) fragment, developed in Russia and studied extensively there since the 1980s. Research indicates it influences expression of BDNF and NGF — two neurotrophic factors involved in neuronal growth and survival. Published studies have examined its effects on cognition, attention and memory, its neuroprotective activity in models of cerebral ischaemia, and its use in stroke recovery.\u003c\/p\u003e\n\u003cp\u003eResearch on Semax includes both human clinical studies, largely published in Russian-language journals, and animal models. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/semax-dosage-research\"\u003eSemax Dosage: What Studies Have Actually Investigated\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"10mg","offer_id":53516004065608,"sku":null,"price":35.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_74a6f611-3469-43bd-9bd2-b8abb02bb05c.jpg?v=1784392865"},{"product_id":"ss-31-pen-refill","title":"SS-31 Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eSS-31 — The Mitochondrial Protector\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports mitochondrial function\u003c\/li\u003e\n\u003cli\u003eTargets cardiolipin\u003c\/li\u003e\n\u003cli\u003eSupports cellular energy\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eSS-31 pen refill cartridge, supplied ready to insert into a peptide pen. Available in 10mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e SS-31 (elamipretide) — \u003ca href=\"\/products\/ss-31\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eSS-31, also known as elamipretide, is a mitochondria-targeting tetrapeptide that binds cardiolipin, a phospholipid unique to the inner mitochondrial membrane. Published work has examined its influence on cristae structure and electron transport chain efficiency, cardiac and renal ischaemia-reperfusion injury, and it has been carried into human trials by Stealth BioTherapeutics for Barth syndrome and primary mitochondrial myopathy.\u003c\/p\u003e\n\u003cp\u003eSS-31 has been studied in human clinical trials. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/dosage-cycle-information-ss-31-mots-c-and-nad-what-published-research-actually-shows\"\u003eSS-31, MOTS-c \u0026amp; NAD+ Dosage: What Studies Show\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"10mg","offer_id":53516004131144,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_065fe10d-6139-4f13-b126-f895e74a3957.jpg?v=1784479076"},{"product_id":"tesamorelin-pen-refill","title":"Tesamorelin Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eTesamorelin — The Growth Hormone Booster\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncreases fat loss\u003c\/li\u003e\n\u003cli\u003eImproves body composition\u003c\/li\u003e\n\u003cli\u003eBoosts growth hormone levels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eTesamorelin pen refill cartridge, supplied ready to insert into a peptide pen. Available in 5mg and 10mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 5mg and 10mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e Tesamorelin — \u003ca href=\"\/products\/tesamorelin\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eTesamorelin is a synthetic analogue of growth hormone-releasing hormone, built on the full 44-amino-acid sequence with a trans-3-hexenoic acid group added for stability. It acts on the growth hormone axis, stimulating the pituitary to release growth hormone and raising circulating IGF-1. Published research has examined its effect on visceral adipose tissue, body composition and lipid profile, and cognitive function in older adults.\u003c\/p\u003e\n\u003cp\u003eTesamorelin has been studied in human clinical trials and is approved by the FDA as Egrifta for HIV-associated lipodystrophy. Our summary of the published literature is here: \u003ca href=\"https:\/\/pepsource.co.uk\/blogs\/research\/tesamorelin-dosage-research\"\u003eTesamorelin Dosage: What Studies Have Investigated\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"5mg","offer_id":53516004163912,"sku":null,"price":30.0,"currency_code":"GBP","in_stock":true},{"title":"10mg","offer_id":53516004196680,"sku":null,"price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402.jpg?v=1784157178"},{"product_id":"glutathione-pen-refill","title":"Glutathione Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eGlutathione — The Master Antioxidant\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports antioxidant defence\u003c\/li\u003e\n\u003cli\u003eSupports detoxification\u003c\/li\u003e\n\u003cli\u003eSupports skin brightness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eGlutathione pen refill, supplied ready to insert into a peptide pen. Available in 1500mg.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupplied as three cartridges, not one.\u003c\/strong\u003e At 1500mg, glutathione cannot be held in the 3ml a single pen cartridge takes. It is reconstituted with \u003cstrong\u003e9ml of bacteriostatic water\u003c\/strong\u003e and split across \u003cstrong\u003e3 × 3ml cartridges\u003c\/strong\u003e, each containing 500mg at approximately 166.7mg\/ml. You insert one cartridge at a time and swap to the next when it runs out.\u003c\/p\u003e\n\u003cp\u003eEach set is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridges, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 1500mg total\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat you receive:\u003c\/strong\u003e 3 × 3ml cartridges, 500mg per cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconstitution:\u003c\/strong\u003e 9ml bacteriostatic water across the set — approximately 166.7mg\/ml in each cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e Glutathione — \u003ca href=\"\/products\/glutathione\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate all three cartridges on arrival and keep away from light. Glutathione is markedly less stable in solution than as a lyophilised powder, so use the set promptly rather than holding the unopened cartridges long term. If you would rather reconstitute only what you need, the \u003ca href=\"\/products\/glutathione\"\u003epowder vial\u003c\/a\u003e is the better choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy three cartridges\u003c\/h2\u003e\n\u003cp\u003eA standard pen cartridge holds 3ml. Packing 1500mg into that volume would mean 500mg\/ml, which is beyond what glutathione will reliably hold in solution — so the full amount is spread across three cartridges at a concentration that stays dissolved. The total you receive is the same 1500mg; it simply arrives in three parts rather than one.\u003c\/p\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eGlutathione is a tripeptide of glutamate, cysteine and glycine, and the body's principal intracellular antioxidant. Published research has examined its scavenging of free radicals and role in oxidative stress; phase II detoxification, where it conjugates to toxins to make them water-soluble for excretion; maintenance of cellular redox balance; and skin pigmentation, where studies have examined its effect on melanin synthesis.\u003c\/p\u003e\n\u003cp\u003eResearch on glutathione includes both human studies and animal models.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"1500mg — 3 cartridges","offer_id":53600241516872,"sku":null,"price":40.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/glutathione-pen-refill-pepsource.jpg?v=1787151041"},{"product_id":"dsip-pen-refill","title":"DSIP Pen Refill","description":"\u003cp\u003e\u003cstrong\u003eDSIP — The Sleep Peptide\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStudied for delta-wave sleep activity\u003c\/li\u003e\n\u003cli\u003eNonapeptide that crosses the blood–brain barrier\u003c\/li\u003e\n\u003cli\u003eAlso investigated in stress and analgesia research\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eDSIP pen refill cartridge, supplied ready to insert into a peptide pen. Available in 5mg.\u003c\/p\u003e\n\u003cp\u003eEach cartridge is reconstituted and filled individually at the point of order — we never hold pre-reconstituted stock on a shelf. Made-to-order items are dispatched within 48 hours.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct format:\u003c\/strong\u003e Pre-filled pen cartridge, made to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e 5mg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource compound:\u003c\/strong\u003e DSIP — \u003ca href=\"\/products\/dsip\"\u003ealso available as a lyophilised powder vial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso available as:\u003c\/strong\u003e \u003ca href=\"\/products\/dsip-nasal-spray\"\u003eDSIP nasal spray\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSequence:\u003c\/strong\u003e Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu (WAGGDASGE) — linear nonapeptide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Reconstituted and filled to order, never pre-mixed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Refrigerate on arrival; keep away from light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch:\u003c\/strong\u003e Within 48 hours (made to order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Laboratory research use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResearch Focus\u003c\/h2\u003e\n\u003cp\u003eDSIP was isolated in 1977 from the cerebral venous blood of rabbits undergoing induced slow-wave sleep, and takes its name from the delta-wave EEG activity observed in those experiments. Early human work examined its influence on disturbed sleep, with published studies reporting shorter sleep onset latency and improved sleep efficiency.\u003c\/p\u003e\n\u003cp\u003eResearch interest has since extended beyond sleep, into stress-axis and corticotropin regulation, thermoregulation, analgesia, opioid withdrawal models and antioxidant activity — which is why the literature often describes DSIP as multifunctional rather than sleep-specific.\u003c\/p\u003e\n\u003cp\u003eIt is worth being clear about the state of the evidence: despite the name, DSIP's status as an endogenous sleep factor remains unresolved. No corresponding gene, precursor protein or receptor has been identified, and findings across studies have been inconsistent — a 2006 review in the \u003cem\u003eJournal of Neurochemistry\u003c\/em\u003e characterised it as a still-unresolved riddle. DSIP remains an active subject of laboratory investigation rather than a settled one.\u003c\/p\u003e\n\n\u003ch2\u003eTesting \u0026amp; Certificates of Analysis\u003c\/h2\u003e\n\u003cp\u003eCartridges are filled from the same independently tested material as our powder vials — HPLC purity and mass-spectrometry identity, certified per batch and published on our \u003ca href=\"\/pages\/lab-results\"\u003elab results page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eMade-to-order items are prepared individually for you and are exempt from the 14-day cancellation right under the Consumer Contracts Regulations 2013. They cannot be returned or refunded unless faulty, damaged or not as described. See our \u003ca href=\"\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor laboratory research use only.\u003c\/strong\u003e All products sold by PepSource are strictly for laboratory research purposes and are not intended for human or veterinary consumption. No dosing, administration or physiological guidance is provided.\u003c\/p\u003e","brand":"PEP SOURCE","offers":[{"title":"5mg","offer_id":53882832912712,"sku":null,"price":23.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/5593\/1720\/files\/5a64486d9586ac1716bed874e1b01020d6bc23ce6ec829e6a3daa118a8908402_b43626a8-b9c2-4946-b575-e6068a22561b.jpg?v=1787354844"}],"url":"https:\/\/pepsource.co.uk\/collections\/pen-refills.oembed?page=2","provider":"PepSource","version":"1.0","type":"link"}