Malic acid

Malic acid is a dicarboxylic acid found in many sour or tart-tasting foods. When eaten, it produces a mellow and persistent sour taste. The most common source of this compound is unripe fruit. This acid is also produced within the human body as a part of the citric acid cycle. The salts of malic acid, known as maltates, are an important intermediary step in the cycle. The most common use of malic acid is in food products, notably in candy and potato chips. Sour candies often use it rather than its sweeter cousin, citric acid, as the sourness is more intense. Salt and vinegar flavored potato chips also use it to produce a tart, vinegar-like flavor.

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