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By enhancing both collagen and hyaluronic acid production, GHK-Cu helps reduce wrinkles, restore firmness, and improve overall skin texture

Cholesterol is a steroid molecule that is a large component of cellular membranes and a precursor to steroid hormones and vitamin D, among other functions

Retinol is an over-the-counter precursor that your skin converts in two steps (first to retinaldehyde, then to retinoic acid) before it becomes active

That age-related decline lines up with when a lot of us start noticing our skin acting differently

[7] Other research in mice, however, has shown that oxidative stress and inflammation brought on by aging lower NAD+ production