Methodology Changes

Testing scope defined: individual peptide products are tested for identity (LC-MS/MS) and analytical purity (RP-HPLC). Blends, sprays, capsules, creams, dissolvable strips, and other nonstandard formats are outside the current scope.

Laboratory: ACS Laboratory confirmed as the independent testing laboratory. Products are checked for method suitability before entering the random selection pool.

Selection: products are purchased independently, chosen at random, with no advance notice to the vendor. Participating vendors are tested multiple times a year.