Magnesium is involved in over 300 metabolic reactions. Magnesium regulates muscle contraction. Magnesium is part of the molecule ATP, which is the principal provider of energy to the body. Magnesium deficiency is associated with tension headaches and premenstrual pain. 100% amino acid chelated magnesium maximises absorption. Synergistic vitamin B6 enhances the absorption of magnesium. Suitable for vegetarians and vegans.