For best results, use consistently for 2-3 weeks
Toth PP, Patti AM, Giglio RV, et al
The primary risk comes from unregulated products, which is why you should never purchase peptides on your own
They found that standard aqueous solutions of AHK-Cu were ineffective because the hydrophilic peptide could not penetrate the sebum-rich environment of the hair follicle and was easily washed away during rinsing
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GHK-Cu, a naturally occurring copper-binding tripeptide, excels in skin rejuvenation, collagen remodeling, and topical wound healing through copper-dependent enzyme activation