Applying AHK-Cu and immediately lying on a pillow transfers product to fabric instead of keeping it on your scalp
If you're comparing products, understanding GHK-Cu versus other copper peptides helps you make informed decisions
[PMC free article: PMC4110209] [PubMed: 25067957] 229
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The 20-30 hour half-life means the peptide still distributes systemically regardless of site, so any local-only effect is partial at best