A Vendor Sent You
a "99.8% Purity" PDF.
Here's How to Know If It's Real.
Most "Certificates of Analysis" Are Marketing Documents
Take a close look at the COA (Certificate of Analysis) your peptide vendor sent you. What does it actually prove? In most cases — absolutely nothing.
A COA is only as trustworthy as the lab that produced it. But here's what most researchers don't know: many vendors generate their own COAs in-house, manipulate existing reports, or use labs that have never been independently verified. A well-designed PDF with a logo and a "99.7% purity" claim is worth exactly zero if you can't verify where it came from and whether it means what it says.
The peptide market is self-regulated. There is no FDA oversight for research-grade peptides. No one is checking whether the vendor's COA matches what's actually in the vial. The only person who can verify the quality of what you're putting into your research protocol — is you.
What You'll Learn in 30 Minutes
How to Read an HPLC Chromatogram (Without a Chemistry Degree)
We break down every element of an HPLC report in plain English: the x-axis, y-axis, retention time, peak area percentage, and — most critically — what "purity percentage" actually means and what it intentionally leaves out.
The 5 Red Flags of Fake or Manipulated COAs
Suspiciously round purity numbers ("99.0%" — no decimal variation), missing batch numbers, labs you can't independently verify, COAs that don't match the product description, and the "too-perfect-to-be-real" chromatogram. Each flag comes with real-world examples.
Third-Party vs. In-House: How to Tell the Difference
A vendor's "in-house lab" COA is marketing. A Janoshik, MZ Biolabs, or Chromate COA is verification. We show you how to cross-reference a lab's report format and identify when a vendor is passing off internal testing as independent analysis.
Batch Numbers, Fill Weights, and What "Purity" Actually Misses
A 99.5% purity claim means nothing if the vial was underfilled. Learn how to verify batch numbers across labs, cross-reference fill-weight audits, and understand the difference between purity testing and content testing — two completely separate things that vendors love to blur together.
The BiohackTested COA Verification Checklist
A printable one-page checklist you can use every time a vendor sends you a COA. Run through 12 verification steps in under three minutes and know — with reasonable confidence — whether the certificate is legitimate.
What This Guide Is — And What It Isn't
✅ This Guide Is
- A practical, accessible HPLC-reading crash course
- A red-flag detection system you can use immediately
- A framework for verifying any peptide vendor's quality claims
- Research-grounded, with real COA examples analyzed
- Written for researchers without chemistry backgrounds
❌ This Guide Is NOT
- A comprehensive analytical chemistry textbook
- Medical advice about which peptides to take
- A vendor endorsement or anti-endorsement list
- Mass spectrometry advanced training
- A replacement for professional laboratory analysis
Why $9?
This is a single focused skill — learning to read and verify COAs — taught in a way that gives you genuine self-sufficiency. You can master it in one evening. The price reflects that: one takeaway coffee's worth of money for a skill that might save you from ordering hundreds of dollars of unverified peptides.
It's also priced to make it a no-brainer upgrade when you're already reading our free vendor reviews or peptide wiki pages. You're already here doing research. For $9, you can learn to verify what you're researching.
Don't Trust. Verify.
Every peptide vendor claims purity. Learn which claims actually hold up — in 30 minutes.
Get the COA Decoder — $9 →Instant PDF download. Readable on desktop, tablet, and mobile.
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