Phosphoric Acid Preservative

Phosphoric acid is a mineral acid that occurs naturally in plants and animals. It is manufactured industrially from phosphate rock. It is a colorless, odorless liquid that is highly acidic.

Phosphoric acid is used as an acidity regulator and preservative in many foods and beverages, especially colas and other soft drinks. It adds a tart flavor and helps prevent spoilage. It is also found in baked goods, processed meats, and dairy products.

In the US, phosphoric acid is generally recognized as safe (GRAS) by the FDA for use as a food additive. It is a common ingredient in the American diet. Some studies suggest that high intake of phosphoric acid, particularly from sodas, may be linked to lower bone density, but evidence is mixed and more research is needed. JECFA and EFSA have evaluated phosphoric acid and its salts, and have established acceptable daily intakes.