Does magnesium help with constipation?

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    Last Updated: April 23, 2025

    Some people use milk of magnesia, which contains magnesium hydroxide, to relieve constipation, and although some studies suggest that it may be beneficial, the overall effectiveness remains unclear due to insufficient high-quality research. Additionally, individuals who are taking medications or with certain health conditions should consult their doctor before using it.

    Some people take Milk of Magnesia, which contains magnesium hydroxide, to alleviate constipation. While some studies find a benefit,[1][2][3][4] its overall efficacy is unclear due to a lack of high-quality research.[5][6] Other studies have found that magnesium oxide might also improve constipation;[7][8][9] similarly, however, further high-quality research is needed to draw firm conclusions concerning its efficacy.

    It’s important to note that Milk of Magnesia has several drug interactions (e.g., aspirin, prednisone, cholecalciferol (vitamin D3)); therefore, people who use medications should consult their doctor before using Milk of Magnesia/magnesium hydroxide. Furthermore, Milk of Magnesia interacts with several conditions. People with intestinal disorders, kidney problems, or inflammatory bowel disease should also consult their doctor before using Milk of Magnesia/magnesium hydroxide.

    Does magnesium help with constipation? - Examine