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What is GHK-Cu (Copper tripeptide) used in cosmetics

GHK-Cu : A natural copper-binding tripeptide studied for ECM remodeling pathways in in-vitro fibroblast cultures and animal skin biology models

Because it works through a nourishment pathway rather than by blocking androgens, it does not affect hormonal balance and is appropriate for female-pattern hair loss

The documented mechanisms are: VEGF stimulation in dermal fibroblasts that supports the microvascular network feeding the follicle, collagen and glycosaminoglycan synthesis at the follicular basement membrane, anti-inflammatory signaling that calms the chronic micro-inflammation associated with androgenetic alopecia, and direct follicular signaling that extends the anagen growth phase

Normal supplement doses do not show negative interactions