Magnesium is a multifaceted mineral with many roles in the body. It supports essential nerve muscle and heart function helps convert food into cellular energy and helps relax the body. Nature Made Extra Strength Magnesium provides 400 mg in one daily softgel. Supports muscle relaxation heart nerve and bone health Extra Strength 400 mg 1 daily softgel No synthetic dyes no artificial flavors no preservatives gluten free #1 Pharmacist Recommended Vitamin and Supplement Brand