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ghk-cu tolerance desensitization downregulation effectiveness over time Are We Ready to Measure Skin Permeation of Modern Antiaging GHK–Cu Tripeptide Encapsulated in Liposomes? The Effect of the Human
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doi: 10.3389/fncel.2024.1378579 11 CadenaJ.SalesA

Both peptides enhance cellular antioxidant systemsGHK-CU through direct antioxidant activity and Epithalon through gene expression modulationprotecting against oxidative stress and age-related damage

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European Journal of Clinical Nutrition, 72(1), 105111

And that's on top of the tradeoffs that are never discussed