1. In the medical field: Magnesium citrate is used as a laxative to treat constipation and relieve gastrointestinal discomfort; 2. In the food industry: Magnesium citrate is a food acidifier and chelating agent, often used in the production of fruit acid drinks, dairy products, etc.; 3. In the pharmaceutical industry: Magnesium citrate is used as a magnesium supplement to treat magnesium deficiency; 4. In the cosmetics industry: used to adjust the pH value of cosmetics and increase stability.