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Cultured human keratinocytes have been suggested as good models to predict dermal irritancy of substances in human subjects 31
GHK-Cu contributes copper-dependent antioxidant and anti-fibrotic activity by modulating inflammatory cytokines, enhancing collagen and elastin synthesis, and inhibiting TGF-?1 signaling
They work by blocking the conversion of testosterone into dihydrotestosterone (DHT), its more potent form
Insulin resistance is one of the leading causes of aging, and improving insulin sensitivity may help slow down the aging process
Most studies are on animals
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