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Importantly, this relationship is relevant to humans as individuals with exceptional longevity are enriched with functional IGF-1R mutations 13 , while low IGF-1 levels predict better survival in female nonagenarians 16
By counteracting oxidative stress, it could potentially help minimize the appearance of wrinkles, fine lines, and other age-related skin changes
Glutathione may help reduce melanin production, which can gradually improve skin tone and support skin whitening goals when performed under professional medical supervision
Disentangling the effects of circulating IGF-1, glucose, and cortisol on features of perceived age
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