What is a fruit acid?
Fruit acid is a term used to describe a group of substances that occur naturally in the vegetable and animal kingdoms by a fermentation process. Some examples of fruit acids include vinegar (acetic acid) from fermentation of grapes, malic acid from apples, and glycolic acid from sugar cane. The unique fruit acid common in the animal kingdom, and especially in mammals, is lactic acid. All of the fruit acids have a chain of carbon atoms with an acid group on the first carbon atom, and a hydroxy group on the second carbon atom. Fruit acids are classified as alpha hydroxy acids and have the ability to act on the skin surface cells to promote exfoliation.
