Quality & testing FAQ
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What does 99% purity mean?
It means that in an HPLC test, about 99% of what was detected was the target peptide. It does not by itself confirm the molecule’s identity or how much peptide is in the vial by weight.
What is the difference between purity and peptide content?
Purity compares the target peptide to other peptide-like impurities. Net peptide content is the share of the total powder weight that is peptide, after accounting for salts and water.
What is a COA?
A certificate of analysis is a lab report showing test results for a specific batch. It is only meaningful if it matches your batch and can be verified with the lab.
Why does third-party testing matter?
An independent lab has no stake in the result. In-house testing is the seller grading their own work.
What are endotoxins?
Fragments of bacterial cell walls that can cause fever and inflammation. They are measured with the LAL test.
Does a good COA mean a product is safe to use?
No. Testing describes what is in a sample. Whether anything is appropriate for a person is a medical decision for a licensed provider. Products that are not FDA-approved have not been established as safe or effective.
What is cGMP?
Current Good Manufacturing Practice: FDA-enforced manufacturing standards for approved drugs. Research-grade products are not made under those requirements.