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Cosmetic copper peptide formulations typically contain GHK-Cu at very low concentrations (0.05-0.2%) in topical bases optimized for skin penetration
A typical bacteriostatic water vial contains 30ml, enough for multiple reconstitutions
People who skip SPF see slower visible results
Expect 30 to 40% improvement in wrinkle depth on mild-to-moderate photodamage over 12 to 16 weeks
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