What a COA can — and cannot — prove
A certificate of analysis can be useful, but it is not a magic safety certificate. Patients should know what the document actually verifies and what questions remain.
What a COA can show
A COA may show whether a tested lot met specific criteria such as identity, potency, sterility, endotoxin, or other quality checks listed by the testing lab.
What a COA cannot show
A COA does not prove that a treatment is appropriate for you, that a provider evaluated you properly, that the vial you received matches the report, or that storage and handling stayed intact.
Match the details
Look for lot number, product name, testing date, lab identity, pharmacy identity, and whether the document connects clearly to the medication being dispensed.
Be careful with screenshots
Screenshots and cropped PDFs are easier to misread. A better process gives patients a complete report or a verifiable registry entry tied to a pharmacy and lot.
Use COAs with clinical context
The safest pathway combines legitimate prescribing, transparent pharmacy sourcing, meaningful follow-up, and documentation. A COA is one piece of that picture.
Common questions
Does a COA mean a peptide is FDA approved?
No. A COA is a testing document. It does not mean the drug, indication, or compounded preparation is FDA approved.
Should every compounded peptide have a COA?
Patients can reasonably ask what testing documentation exists and how lot-level quality is verified. Availability varies by pharmacy and product.
Can PepKey verify my vial from a COA?
PepKey can help surface public transparency signals and registry-style records where available, but patients should confirm specifics directly with the dispensing pharmacy and clinician.
Search PepKey's provider directory or review the scoring methodology.