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While GHK-Cu affects 31.2% of genes, gene expression changes in laboratory conditions do not guarantee the same magnitude of effect in living humans applying a topical product
Westman J, Hallgren J, Wahlbeck K, Erlinge D, Alfredsson L, Osby U
Martins C, Kulseng B, Rehfeld JF, King NA, Blundell JE
Choosing the right one depends on your specific goals, but both require a high-quality delivery system to be effective
The authors concluded that the nutraceutical collagen peptides had positive effects on skin structure, and this supplementation could induce regeneration of collagen fibers in human skin [47]
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