Swanson Coral Calcium Complex Promote strong bones with Swanson Coral Calcium Complex! This unique mineral formula features the ideal 2:1 ratio of calcium to magnesium in a pH-balanced combination created by nature. Each one-capsule serving provides: 250 mg of calcium 125 mg of magnesium 1.25 mcg (50 IU) of vitamin D for better calcium absorption Calcium derived from marine organisms, such as Coral Calcium, has: Higher absorption compared to other sources. It does not lead to hypercalcemia or hypocalcemia.Calcium: Contributes to normal blood clotting, normal energy metabolism, normal muscle function, normal neurotransmission and normal functioning of digestive enzymes. Magnesium: Important for proper muscle function, helps reduce fatigue and exhaustion, contributes to electrolyte balance and normal psychological functioning. Dosage: Take 1 capsule 3 times daily with water and food.