ghk cu topical side effects “Is GHK-Cu actually worth it?” is genuinely one of the most common questions in my comments, so let me finally answer it properly., The short version: copper peptides have real research behind them, Copper Peptides' Skincare Effects, Potential
Description
Given that GHK-Cu is a naturally occurring molecule present in human plasma, concerns about long-term topical use seem largely theoretical

Payer-Specific Authorization Scenarios Some United Healthcare plans grant separate authorizations for 90791 and therapy codes like 90834 and 90837

Nakamura A, Nakashima M, Sugao T, et al

Opening these substances up to bulk compounding is basically a massive, unsafe, human experiment
