Optimal Magnesium by Seeking Health provides 150 mg of high potency magnesium per vegetarian capsule. Magnesium is an important and abundant mineral naturally present in the body, which acts as a cofactor in hundreds of enzymatic processes and systems. It helps regulate biochemical reactions in the body, including protein synthesis, muscle and nerve function, normal sugar and carbohydrate metabolism and healthy blood circulation. Magnesium is involved in normal muscle relaxation by inhibiting calcium influx and smooth muscle contraction. It is also important for energy production, oxidative phosphorylation, and glycolysis. It contributes to the maintenance and development of healthy bone structure and is needed for the synthesis of DNA, RNA, and glutathione, an important antioxidant.