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The problem, though, is that it's very unstable, turns brown and becomes ineffective in no time (after a few month) and the cosmetics industry is trying to come up with smart derivatives that are stable and have the magic properties of pure Vitamin C
A 2025 study found GHK-Cu combined with minoxidil produced 35% terminal hair growth versus 18% with minoxidil alone
however Japanese OPITAC Glutathione in Chicnutrix Glow is clinically proven to be absorbed by the body even when consumed orally It is uniquely formulated with Swiss effervescent technology and it is vegan
PMC12313605 Staresinic, M., et al
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