Composition Amount per serving: Calcium Carbonate equiv. (Elemental Calcium 400 mg) Vitamin D3 200IU Boron Citrate 60 mg ( Equiv. 3 mg Boron) Magnesium Oxide. 311.7 mg ( Equiv. 188 mg ) Menaquinone-7 (Viy K2) 4.5 mg. ( Equiv. 90 mcg)