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GHK-Cu cycling - typically 30 days on / 14 off or 8 weeks on / 4 off - produces comparable results, reduces cost, limits theoretical copper load and keeps receptor sensitivity fresh

For now, topical GHK-Cu remains the most research-supported and widely used method, especially for skincare and haircare routines

Density corresponding to metal ions was not identified on SRCR2

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Bakrim S, Benkhaira N, Bourais I, Benali T, Lee LH, El Omari N, Sheikh RA, Goh KW, Ming LC, Bouyahya A (2022) Health benefits and pharmacological properties of stigmasterol

These compounds are thought to protect the retina in a different mechanisms of actions: blocking oxidation reactions in photoreceptor cells, saving the underlying layer of photoreceptor cells from light-induced damage, and filtering blue light with high energy and short wavelengths [246]