Sisu Magnesium - 250 mg - This synergistic formula combines magnesium for maintenance of a healthy cardiovascular system, with Malic Acid, which has proven very useful in treating fibromyalgia and improving endurance and stamina. Working together, this combination aids the body in calcium absorption, and in the prevention of cardiovascular disease, osteoporosis, kidney and gall stones and oxygen deficiency to the muscles. Especially beneficial for those under prolonged stress.