![]() Among fruits, citric acid is most concentrated in lemons and limes, 1 comprising as much as 8% of the dry fruit weight. Citrate salts of various metals are used to deliver minerals in biologically-available forms examples include dietary supplements and medications. Citric acid is frequently used as a food additive to provide acidity and sour taste to foods and beverages. ![]() At physiologic blood pH, and to a lesser extent in urine, it exists mainly as the trivalent anion. Citric acid (2-hydroxy-1,2,3-propanetricar-boxylic acid) is a weak tricarboxylic acid that is naturally concentrated in citrus fruits.
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