Peak Peptide
Peak (EU supplier) gives you content-rich COAs per order: HPLC chromatogram, mass-spec data, heavy-metals panel. They're also unusually upfront about the difference between independent, community and manufacturer testing. The problem is they never say which one they actually use, so you don't know if the COA is independent or in-house, and all sales are final.
Score Breakdown
Rich methods stated (HPLC, MS, ICP-MS, LAL) but explicitly ambiguous on whether COAs are independent vs in-house.
COA includes HPLC chromatogram, MS data and heavy-metals panel per order, richer content than most peers.
Batch-specific COA per order; lot/date specifics unconfirmed.
No supplier disclosure.
No independent reviews retrieved; not on reptides.
24-48h dispatch; all sales final reduces buyer protection.
Candid about the difference between independent, community, and manufacturer testing.
Own site only; via render proxy.
Positive Signals
- +COA includes HPLC chromatogram + MS data + heavy-metals panel
- +Methods explicitly listed (HPLC/MS/ICP-MS/LAL)
- +Candid about testing-type distinctions
Trust Concerns
The COA content is strong, but it only counts for so much if you don't know who ran it, and they don't say whether it's an independent lab or their own. Pair that with an all-sales-final policy and I'd want the testing source and lab name confirmed first.
- !Does not clearly state whether COAs are independent third-party or in-house/manufacturer
- !All-sales-final policy reduces buyer protection
Researcher Notes
- •Content-rich COAs (chromatogram + MS + heavy metals)
- •Methods explicitly listed
- •Unclear if testing is independent or in-house
- •All sales final
- •EU-based supplier
Evidence Log
Full COA with HPLC chromatogram, MS data, heavy-metals panel per order; methods HPLC/MS/ICP-MS/LAL; independent vs in-house not specified; all sales final
Evidence accessed 2026-06-26.