Trust Nature Made Magnesium 400 mg easy to swallow softgels to your magnesium supplement needs. According to The National Health and Nutrition Examination Survey (NHANES), 50% of the US population has inadequate dietary intake of Magnesium. Magnesium participates in more than 300 reactions in the body and is critical to many bodily functions such as promoting a steady heart rhythm, keeping bones strong, and converting carbohydrates, protein, and fat into energy. †These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.