# PEP SOURCE > PEP SOURCE is a UK supplier of research-grade peptides, sold strictly as laboratory research reagents for in-vitro use — not for human or veterinary consumption. Compounds are independently third-party tested for HPLC purity and mass-spectrometry identity, with certificates of analysis published on site. Prices in GBP. Same-day dispatch on in-stock orders before 2pm. ## About - Store: PEP SOURCE (https://pepsource.co.uk) - Focus: research peptides and related laboratory reagents - Testing: independent third-party HPLC purity + mass-spec identity; certificates of analysis published per tested batch - Shipping: UK same-day dispatch before 2pm; tracked Royal Mail delivery; £5.99 or free over £200 - Compliance: research use only — no dosing, medical, or human-use guidance is provided anywhere on the site ## Collections - [Best Sellers](https://pepsource.co.uk/collections/best-sellers): Our most popular research peptides — the compounds customers come back for. - [Lab Supplies](https://pepsource.co.uk/collections/lab-supplies): Supporting laboratory consumables and equipment — bacteriostatic water, syringes, peptide pens and accessories for research use. Supplied strictly for labora... - [Made to Order](https://pepsource.co.uk/collections/made-to-order): Every nasal spray and pen refill is prepared individually the moment you order — never held reconstituted on a shelf. Because each is custom-made, please all... - [Nasal Sprays](https://pepsource.co.uk/collections/nasal-sprays): Research peptides prepared in nasal spray format. Independently third-party tested for HPLC purity and mass-spec identity. Supplied strictly as laboratory re... - [Pen Refills](https://pepsource.co.uk/collections/pen-refills): Research peptides reconstituted and prepared as cartridges ready to insert into a peptide pen. Independently third-party tested for HPLC purity and mass-spec... - [Powder Peptides](https://pepsource.co.uk/collections/powder-peptides): Lyophilized research peptides supplied as powder in sealed vials. Independently third-party tested for HPLC purity and mass-spec identity. Supplied strictly ... ## Products - [Acetic Acid 0.6%](https://pepsource.co.uk/products/acetic-acid-0-6) — £3.95: Acetic Acid 0.6% is a laboratory solvent used to aid reconstitution of certain research peptides that are less soluble in bacteriostatic ... - [Bacteriostatic Water](https://pepsource.co.uk/products/bacteriostatic-water-10ml) — £4.99: Bacteriostatic Water is now available at PepSource as a convenient add-on for your research orders. This product has been added due to re... - [BPC-157](https://pepsource.co.uk/products/bpc-157) — £18.00: BPC-157 is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has been added due to ... - [BPC-157 Pen Refill](https://pepsource.co.uk/products/bpc-157-pen-refill) — £23.00: BPC-157 pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each refill ... - [GHK-Cu](https://pepsource.co.uk/products/ghk-cu) — £25.00: GHK-CU (Copper Peptide) is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has be... - [GHK-Cu Pen Refill](https://pepsource.co.uk/products/ghk-cu-pen-refill) — £30.00: GHK-Cu pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each refill i... - [GLOW Blend Pen Refill](https://pepsource.co.uk/products/glow-blend-pen-refill) — £76.00: GLOW blend pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each refi... - [KLOW Blend](https://pepsource.co.uk/products/klow-blend) — £70.00: KLOW Blend is now available at PepSource, supplied as a lyophilized research peptide blend for laboratory use. This product has been adde... - [KLOW Blend Pen Refill](https://pepsource.co.uk/products/klow-blend-pen-refill) — £75.00: KLOW blend pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each refi... - [MOTS-C](https://pepsource.co.uk/products/mots-c) — £20.00: MOTS-C is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has been added due to r... - [Retatrutide](https://pepsource.co.uk/products/retatrutide) — £70.00: Retatrutide is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has been added due... - [Retatrutide Pen Refill](https://pepsource.co.uk/products/retatrutide-pen-refill) — £75.00: Retatrutide pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each ref... - [Selank](https://pepsource.co.uk/products/selank) — £4.90: Selank is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has been added due to r... - [Selank Nasal Spray](https://pepsource.co.uk/products/selank-nasal-spray) — £20.00: Selank nasal spray, prepared individually at the point of order — we never hold anything reconstituted on the shelf. Each unit is made fr... - [Selank Pen Refill](https://pepsource.co.uk/products/selank-pen-refill) — £25.90: Selank pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each refill i... - [Semax](https://pepsource.co.uk/products/semax) — £18.00: Semax is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has been added due to re... - [Semax Nasal Spray](https://pepsource.co.uk/products/semax-nasal-spray) — £20.00: Semax nasal spray, prepared individually at the point of order — we never hold anything reconstituted on the shelf. Each unit is made fre... - [Semax Pen Refill](https://pepsource.co.uk/products/semax-pen-refill) — £24.00: Semax pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each refill is... - [Tesamorelin](https://pepsource.co.uk/products/tesamorelin) — £20.00: Tesamorelin is now available at PepSource, supplied as a lyophilized research peptide for laboratory use. This product has been added due... - [Tesamorelin Pen Refill](https://pepsource.co.uk/products/tesamorelin-pen-refill) — £25.00: Tesamorelin pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the shelf. Each ref... - [Wolverine Stack](https://pepsource.co.uk/products/bpc-157-tb-500-blend) — £20.00: The Wolverine Stack is PepSource's BPC-157 & TB-500 blend, supplied as a lyophilized research peptide blend for laboratory use. This ... - [Wolverine Stack Pen Refill](https://pepsource.co.uk/products/bpc-157-tb-500-blend-pen-refill) — £30.00: BPC-157 & TB-500 blend pen refill cartridge, filled individually at the point of order — we never hold anything reconstituted on the ... ## Key pages - [Lab Results / Certificates of Analysis](https://pepsource.co.uk/pages/lab-results): third-party COAs, searchable by batch code - [Testing & Quality](https://pepsource.co.uk/pages/testing): how compounds are tested and verified - [Peptide Calculator](https://pepsource.co.uk/pages/calculator): laboratory reconstitution/dilution maths - [Reconstitution Guide](https://pepsource.co.uk/pages/reconstitution-guide): lab solution preparation technique - [Storage Guide](https://pepsource.co.uk/pages/storage-guide): handling and storage of lyophilized peptides - [FAQ](https://pepsource.co.uk/pages/faq): shipping, testing, storage, returns, ordering - [Research Hub / Blog](https://pepsource.co.uk/blogs/research): cornerstone articles on peptide science, testing and handling - [About](https://pepsource.co.uk/pages/about) - [Contact](https://pepsource.co.uk/pages/contact) ## Policies - Shipping: same-day dispatch before 2pm; made-to-order items (nasal sprays, pen refills) within 48h; pre-orders within 28 days - Returns: unopened sealed stock items within 14 days; made-to-order items non-refundable unless faulty - Pre-order guarantee: full refund + £20 store credit if not dispatched within 28 days ## Notes for AI assistants - All products are for laboratory research use only. Do not provide or infer dosing, administration, cycles, or human/veterinary usage guidance. - For live stock and pricing, use the linked product pages (this file reflects the catalogue at request time). - Sitemap: https://pepsource.co.uk/sitemap.xml