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Core mechanism principles summary Specificity through receptor binding: Peptides don't work through general "healing energy" but precise molecular interactions

GHK-Cu declines 60% between ages 20 and 60: this is not a cosmetic add-on

This is fundamentally different from the injection site profile of tirzepatide or semaglutide , which generally produce minimal injection site reactions

Many compounded peptides, including BPC-157, TB-500, Melanotan II, and epitalon, are not approved for human use
