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Manufacturer 2 yrsCN4.6/5.0 10% Reorder rate 2086 Interested customers 2/2 Matches all ZS New Trend GHK-Cu Exoso Regenerative Facial Serum GHK-Cu Copper Peptide Anti-Aging Cream Collagen-Boosting Korean Skincare $4.50-9.90 Min
Carr, and S
Breast cancer
Evidence summarized by Peptide Sciences notes that copper(II) ions can inhibit type 1 5--reductase activity by up to ~90% in vitro (half-maximal inhibition at ~0.12 g/mL Cu), with substantially less effect on type 2 suggesting follicle-localized DHT suppression without system-wide androgen blockade
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