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ghk-cu plasma levels age Copper Peptide Regeneration Review (2018) — Research Summary Copper Peptides for Skin: What
Description
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The body produces vitamin D when the skin is exposed to sunlight

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(4) Murphy MG, Weiss S, McClung M, Schnitzer T, Cerchio K, Connor J, Krupa D, Gertz BJ

Summarized in plain language: what they did, what they found, and why it matters
BMJ Open 4 (5), e004501
