Direct research vendors like Koi, Limitless Life Nootropics, and Swiss Chems are easy for an individual to order from, and the good ones publish batch COAs or independent test results
What Should You Know About Units, Volume, and Peptide Strength
You need the full picture: serum B12, methylmalonic acid, homocysteine, and if you can get it, holotranscobalamin
Certificate of Analysis (COA) A legitimate COA must be batch-specific (not a generic template), produced by an independent third-party laboratory, and include both HPLC purity data and mass spectrometry identity confirmation
Thats without accounting for the unclocked time we spent consulting with healthcare providers who prescribe peptides, to better understand where epitalon stands on the therapeutic landscape