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GHK-Cu shines in this area it boosts pro-collagen and collagen production in the skin
see figure 13 in [10]
It works by inhibiting the production of melanin, the pigment responsible for the color of our skin
This randomized, double-blind, placebo-controlled crossover study, conducted at the University of North Carolina at Chapel Hill, enrolled twenty-five aerobically fit males randomly assigned to ingest six capsules of L-citrulline + GSH (Setria Performance Blend (SPB)) or placebo (PL) one hour prior to exercise for eight days
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