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Effect of glucagon-like peptide-1 receptor agonists on circulating levels of leptin and resistin: A meta-analysis of randomized controlled trials

Environmental factors like UV exposure or pollution accelerate this by inducing more DNA damage, thus more PARP activity

For overall skin antiaging, firmness, and repair, GHK-Cu is generally considered the gold standard because its better researched and consistently improves collagen, wound healing, and visible skin quality

Fox LP, Geyer AS, Husain S, Della-Latta P, Grossman ME

Some practitioners have reported improvements in skin conditions, mood, and immune function in patients receiving penta deca peptide arginate for gut health protocols, though these observations require controlled study to confirm