Beyond the standard
PepSource was founded on a simple frustration: research reagents sold with big claims and no evidence. We set out to build a supplier where every single batch is independently verified, every certificate is published, and every order ships fast from UK stock.
Today we supply laboratories, institutions and qualified researchers with research-grade peptides backed by third-party HPLC and mass spectrometry testing. No cut corners, no unverifiable claims — just documented quality, cold-chain handling and same-day dispatch.
What we stand for
- Evidence over claims — if we can't verify it, we don't sell it.
- Transparency — batch-level COAs, published openly.
- Compliance — strictly research-use-only supply, with clear labelling.