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The safest and most scientifically accurate approach is to define the exact peptide, limit all biological statements to the relevant in vitro, ex vivo, or institutionally approved animal-model context, and avoid any wording that implies human, veterinary, cosmetic, diagnostic, or personal-use suitability

The mechanism by which oral glutathione reaches skin tissue to modulate pigmentation and oxidative stress [72] has been presented and reviewed elsewhere [65, 73]

M., de la Cruz-Ares S., Torres-Pea J

Almost all the strongest evidence comes from one researcher who founded a copper peptide skincare company

(2023) 85:113120.e120

2014;9(2):e87497