Alpha-hydroxy acid
noun
a type of organic acid, commonly used in skin-care preparations, that has a hydroxyl group attached to the carbon atom next to the carbon atom carrying the carboxyl group
alpha-hydroxy acid al·pha-hy·drox·y acid (āl’fə-hī-drŏk’sē)
n.
any of various fruit acids with the capacity to trap moisture in the skin and initiate formation of collagen.
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