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Copper peptide serum is a cosmeceutical marketing term that often includes GHK-Cu as the active ingredient
Lowers a signaling protein (TGF-1) and reduces cell stress (measured by an antioxidant enzyme called SOD), both of which contribute to hair follicles shrinking due to the hormone DHT
Signs it's probably overuse damage: Dramatic, localised sagging
Opened bacteriostatic water vial shelf life: ~28 days refrigerated after first use
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