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Table 1 - A quick reference guide of basic definitions and equations The pH of water is defined as the negative logarithm of the hydrogen ion activity, which is often assimilated to the hydrogen ion concentration (Eq

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The cosmetic ingredient regulatory frameworks under which GHK-Cu is used in topical preparations have evaluated the compound for the relevant cosmetic-ingredient endpoints, and the compound has substantial regulated cosmetic use

Nature Aging 2021;1, 1117-1126, doi:10.1038/s43587-021-00151-2

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Never leave a mixed vial at room temperature for more than a couple of hours