The more popular a category gets, the more it matters who tested what.
Popularity brings noise
When research peptides start trending, the number of sellers explodes, and so does the range of quality. Two products with the same name can be very different things.
What HPLC actually tells you
High-performance liquid chromatography separates a sample into its parts and shows how much of it is what it should be. That’s where a number like “purity above 99%” comes from.
Read the certificate
A certificate of analysis should name the batch, the method, the date and the result. If any of those are missing, ask why.
Our rule
HPLC on every batch, a certificate for every lot, made and shipped from the USA. It’s the least anyone should expect.