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The trade-off is that reconstitution adds a step and introduces a small risk of contamination or error
How GHK-Cu Compares to Retinoids, Vitamin C, and Other Anti-Aging Ingredients The 1998 head-to-head trial by Abdulghani measured procollagen synthesis side by side, and the copper-binding peptide outperformed both vitamin C and tretinoin
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Foods like garlic, onions, and cruciferous vegetables (broccoli, cauliflower, kale) are excellent sources
Prasad S et al
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