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Azelaic acid plays well with most ingredients, but layering multiple actives without guidance can overwhelm the skin barrier or dilute efficacy

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Introduction Glutathione is a tripeptide found in many tissues at relatively high concentrations, namely 110 mM in cells, similarly to glucose, potassium, and cholesterol, with a critical role in several physiological processes, such as redox balance preservation, reduction of oxidative stress through detoxification from xenobiotic and endogenous compounds, and immune system modulation (1)

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