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By increasing the production of these hormones, peptides can help build muscle and improve overall body composition

Lifespan extension and delayed immune and collagen aging in mutant mice with defects in growth hormone production

Additionally, it shows a greater ability to inhibit tyrosinase activity (an enzyme that produces melanin and causes hyperpigmentation) than other antioxidants used in skin care, such as kojic acid 2

That broader peptide chatter pulls all peptides up in attention (including GHK-Cu) regardless of whether the topical evidence is stronger than the injectable claims

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