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Gastroenterology 2013;144:1419-25, 1425.e1-3
GHK-Cu cannot cross intact stratum corneum effectively
Tsai YL, Tseng YC, Chen YM, Wen TC, Jan JS
It works around the clock to keep you healthy in several important ways: Your body uses glutathione through a process called redox cycling
Assay Testing Assay testing verifies peptide content, concentration, and label accuracy for finished formulations such as capsules and sprays
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