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For topical products, the relevant question is not plasma half life but dermal residence time, which depends almost entirely on the delivery vehicle

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These systems operate synergistically rather than in isolation, collectively maintaining female reproductive homeostasis through three principal mechanisms ( Figure 1 )

The same Maquart group documented GHK-Cu-driven increases in dermatan sulfate, chondroitin sulfate, and the small proteoglycan decorin, all of which contribute to dermal hydration and structural organization 5

Also promotes wound healing and hair follicle health