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GHK-Cu works through different mechanisms than most peptides and produces distinct effects on skin tissue

Bottom line: Increasing glutathione is best achieved by combining sulfur-rich foods with highly bioavailable "helper" vitamins like Vitamin C and B-vitamins that facilitate the synthesis and recycling of the master antioxidant

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65 The p16INK4A/Rb pathway also plays a critical role in senescence

But compared with glutathione and many trend-driven supplements, it has the strongest claim to being genuinely useful for skin-focused consumers