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Nomnomnom - chemical exfoliating uses acids or enzymes to gently digest (like PacMan) and dissolve the upper layer of dead cells without the aggressive scrubbing. This is most ideal for sensitive and/or inflamed acne conditions, but ALL skins benefit from this technique. Acids and enzymes have been used in skincare for years and are now found in many skincare products for both milder home use and more intensive clinical purposes. Although there are many, some of the most popular AHA (alpha hydroxy acids) are lactic acid (for sensitive skin), glycolic acid (anti-aging), and salicylic acid (acne). For home use, these are found in formulas such as cleansers, toners, serums and creams at low percentages just to keep the skins vibrancy alive and help with product absorption. Overuse of acids and enzymes can result in dryness, flaking, peeling, redness, irritation, so it's best to know the directions and the signs of over exfoliating on the skin - conservative is key!