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Glycolic Acid

Glycolic acid is an AHA and it's the one Board Certified Dermatologist Rose Ingleton, MD has singled out, specifically exfoliants with glycolic acid. "Exfoliants with glycolic acid and gritty particles can cause irritation and micro-abrasions on the skin if used too frequently," says Ingleton. "[They] should be used no more than one to two times per week." In general, it's a good tip to keep exfoliating sessions to a few times a week.

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