Malic acid is an alpha hydroxy acid found in certain fruits and wines. It's used in foods and cosmetics, and sometimes as medicine.

Malic acid is sour and acidic. This helps to clear away dead skin cells when applied to the skin. Its sourness also helps to make more saliva in people with dry mouth. Malic acid is also involved in the Krebs cycle. This is a process the body uses to make energy.

People commonly use malic acid for dry mouth. It is also used for acne, fibromyalgia, fatigue, wrinkled skin, and many other conditions, but there is no good scientific evidence to support these uses.

Malic acid is an alpha hydroxy acid. Don't confuse it with other alpha hydroxy acids (AHAs).

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