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Guides

How to read the evidence

These guides explain how to judge a certificate of analysis and a vendor score. They are not use instructions.

Research & Informational Use Only. PeptideScores does not sell, endorse, or facilitate the purchase of any compound for human use. All compounds referenced are intended for laboratory research purposes only. We review vendors; we do not provide dosing guidance, medical advice, or treatment recommendations.

Step 1

How to read a COA

Step 2

Purity is not identity

Step 3

What a missing test leaves open

Step 4 · Not published

How to verify a lab claim

Step 5

How PeptideScores uses a COA

Step 6 · Not published

How to compare two vendors on testing

Step 7 · Not published

How to read a compound page

Related pages on this site: vendor rankings and the peptide testing reference, which defines every assay that can appear on a certificate.

Research & Informational Use Only. PeptideScores does not sell, endorse, or facilitate the purchase of any compound for human use. All compounds referenced are intended for laboratory research purposes only. We review vendors; we do not provide dosing guidance, medical advice, or treatment recommendations.