Concentration: Most cosmetic formulations contain 0.5% to 2% GHK-Cu
You should treat any use as experimental and risky until researchers complete larger, longer-term trials
Theres a newer peptide called PDA, or pentadeca arginate, that has a very similar molecular structure as BPC-157, but instead of it being an acetate, its an arginate essentially just swapping out one amino acid for another
Compare this to peptides like GHK-Cu or TB-500 , which may require more frequent dosing due to shorter half-lives
Its the storage phase not the act of reconstitution that raises concerns about room temperature, since prolonged exposure outside refrigeration accelerates degradation and shortens the solutions usable window
Patients saw an even greater reduction with additional time on treatment