COA Guides
How to read a Certificate of Analysis — by compound.
A Certificate of Analysis is the lab document that proves what is actually in a vial. Each guide below covers the purity to expect, the six fields a real COA must show, and the red flags to reject — specific to that compound. New to COAs? Start with how to read a peptide COA, what a COA is, and why most peptide COAs are worthless.
Tissue Repair & Recovery
Metabolic & GLP-1
Growth Hormone
Longevity & Cellular
Cognitive & Nootropic
2026 Evaluation
9.6/10
Top-Ranked 2026 Supplier
See a real batch-specific COA before you buy
ROEHN Research publishes a batch-specific Certificate of Analysis with a full HPLC chromatogram on every order, run by a named third-party lab — 9.6/10 in our 2026 evaluation. Readers save 15% with code FREE15.
View ROEHN Research
Save 15% with code FREE15
- Cold-chain shipped
- Batch CoA in every box
- 30-day re-test policy
- 98%+ verified purity