A member of our community messaged me last week asking why his BPC-157 wasn’t working after three weeks.
We dug into it and found out the vendor he bought from didn’t have a third-party Certificate of Analysis. Just an in-house “purity guarantee” with no actual data behind it.
He was probably injecting water.
This is more common than you’d think. The 2026 Peptide Industry Report from BioLongevity Labs just came out and flagged the exact issue: reused COAs, missing mass spectrometry data, and vendors who only provide documentation after you’ve already paid.
So here’s a quick guide to not getting scammed.
When you look at a Certificate of Analysis for any peptide, here are the four things that actually matter:
Third-party testing. The COA should come from a third-party lab — not the vendor’s own facility. In-house testing is a conflict of interest. Look for an accredited lab name and contact info on the document.
HPLC purity data. HPLC (High-Performance Liquid Chromatography) is the standard method for measuring purity. You’re looking for 98%+ purity for research-grade compounds. If the COA doesn’t include an HPLC chromatogram — the actual graph showing the peaks — that’s a red flag.
Mass spectrometry (MS) confirmation. This confirms the compound is actually what they say it is. A mass spec reading should match the known molecular weight of the peptide. No mass spec = you have no proof it’s the right molecule.
Red flags to walk away from:
COA only available after purchase
No lab name or accreditation listed
“99%+ purity” claims with no supporting data
This doesn’t have to be complicated. Before you order from anyone, just ask: “Can I see a batch-specific, third-party COA with HPLC and MS data?” If they can’t produce one, move on.
For reference, the vendor we’ve worked with — American Peptide Research provides third-party tested COAs with full HPLC and MS documentation.
If you’re a first-time customer, the code RECODE35 gets you 35% off.
But regardless of who you buy from, the COA checklist above applies everywhere. Learn to read the paper and you’ll never waste money on bunk compounds again.