Malic Acid is an organic compound. It is a dicarboxylic acid that is made
by all living organisms, contributes to the pleasantly sour taste of fruits, and is used as a food additive. Malic acid has two stereoisomeric
forms (L- and D-enantiomers), though only the L-isomer exists naturally. The salts and esters of malic acid are known as malates. The
malate anion is an intermediate in the citric acid cycle.
Malic Acid contributes to the sourness of green apples. It is present in grapes
and gives a tart taste to wine. When added to food products, Malic Acid is the source of extreme tartness. It is used with or in place of the
less sour citric acid in sour sweets.