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On the enzymology of amino acid transport: transport in kidney and probably other tissues is mediated by a cycle of enzymic reactions involving glutathione
In a separate head-to-head comparison, GHK-Cu outperformed both retinol (vitamin A) and vitamin C in improving skin firmness and elasticity, and it did so without the irritation, photosensitivity, or adjustment period associated with retinoid use
Y., Walch, M
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