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E345 - Magnesium citrate
Magnesium citrate is a magnesium preparation in salt form with citric acid in a 1:1 ratio -1 magnesium atom per citrate molecule-. The name "magnesium citrate" is ambiguous and sometimes may refer to other salts such as trimagnesium citrate which has a magnesium:citrate ratio of 3:2. Magnesium citrate is used medicinally as a saline laxative and to completely empty the bowel prior to a major surgery or colonoscopy. It is available without a prescription, both as a generic and under various brand names. It is also used in the pill form as a magnesium dietary supplement. It contains 11.23% magnesium by weight. Compared to trimagnesium citrate, it is much more water-soluble, less alkaline, and contains less magnesium. As a food additive, magnesium citrate is used to regulate acidity and is known as E number E345. - Wikipedia