GHK-Cu

What it is: A naturally-occurring copper-binding tripeptide present in human plasma. Levels fall by more than 60% between ages 20 and 60, driving visible skin aging.

What it does: Expect smoother, firmer skin with fewer fine lines and wrinkles, faster wound healing, hair regrowth (including on thinning scalps), increased collagen production, and antioxidant protection.

How it's used: Subcutaneous injection for systemic effects, topical creams for skin, or scalp injections for hair restoration.