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Is Acetyl D-Glutamyl D-Leucyl D-Cysteine vegan?

Acetyl D-Glutamyl D-Leucyl D-Cysteine is a synthetic tripeptide derivative produced by the reaction of acetic acid with a peptide consisting of D-glutamic acid, D-leucine, and D-cysteine. It is used in cosmetics as a skin-conditioning agent.

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