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Use on Clean, Freshly Exfoliated Skin GHK-Cu penetrates significantly better through freshly exfoliated skin https://www.bestfillersla.com/wp-content/uploads/2021/12/what-should-you-know-about-vitamin-b12-injections-1-1230-900-blog.jpg Size:M/L w-immune-support Ever heard of GHK-Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level

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