100mg Magnesium from a more bio-available source. Essential for ATP (Adenosine Triphosphate) production for energy. Needed for muscle contraction & relaxation. Aids calcification of the bones & joint mobility This product is uniquely suited to helping you achieve the desired 3:2 ratio of Calcium & Magnesium when Calcium intake from the diet is higher. Directions: 1-3 Tablets with food Ingredients: Active ingredients per tablet: Magnesium (Oxide) 100mg