Skin & Hair
Copper peptides, melanocortins and other peptides studied for skin, hair and tanning.
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GHK-Cu results timeline: what skin, hair and wound studies measured
GHK-Cu’s most promising results, in wound and skin studies, took weeks to months, not days. In rats, a GHK-Cu gel shrank ischemic wounds by…
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GHK-Cu vs Minoxidil for Hair: differences, evidence and safety
Verdict: Minoxidil is an FDA-approved, over-the-counter hair regrowth drug (Rogaine) backed by large randomized trials in men and women. GHK-Cu is an unapproved copper…
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Melanotan 1 vs Melanotan 2: differences, evidence and safety
Verdict: Melanotan 1 is afamelanotide, an FDA- and EMA-approved implant (Scenesse) for the light-sensitivity disorder erythropoietic protoporphyria. Melanotan 2 is unapproved anywhere we checked;…
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GHK-Cu serum vs injection vs retinol: differences, evidence and safety
Verdict: GHK-Cu serum is an unapproved cosmetic ingredient with small human skin studies; injected GHK-Cu is unapproved and has no published human trials; retinol…
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Best peptides for hair loss: what the evidence shows, tier by tier
The best-researched peptides for hair loss are a handful of topical cosmetic peptides, GHK (the peptide in GHK-Cu), acetyl tetrapeptide-3 and the pentapeptide GPIGS,…
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KLOW vs GLOW vs GHK-Cu: differences, evidence and safety
Verdict: GHK-Cu is a copper peptide with small topical human trials. GLOW (GHK-Cu, BPC-157, TB-500) and KLOW (GLOW plus KPV) are unapproved blends that…