Now Cal-Mag DK Calcium and Magnesium are minerals that are essential for bone health. This formula provide Vitamins D and K. Vitamin D-3, a fat soluble vitamin, has a role in bone metabolism, as well as in the absorption of Calcium and Magnesium in the intestine. Vitamin K-2 supports bone health through its participation in healthy bone calcification. Recommended Use: Take 2 capsules twice daily with food, or as directed by a healthcare professional. Store in a cool, dry place after opening.Now Cal-Mag DK Facts: 2 capsules contain: Vitamin D3 (as Cholecalciferol) 8 mcg (333 IU) Vitamin K2 (as Menaquinone) 30 mcg Calcium (from Calcium Citrate) 266 mg Magnesium (from Magnesium Oxide) 133 mg Other Ingredients: Gelatin (capsule), Stearic Acid (vegetable source), Magnesium Stearate (vegetable source) and Silica.