Each serving of Bluebonnet Liquid Calcium Magnesium Citrate Plus Vitamin D3 delivers 600 mg of calcium, 300 mg of magnesium and 400 IU of vitamin D3. These three nutrients form a powerful tonic for bone nourishment.Bluebonnet Nutrition Liquid Calcium Magnesium Citrate Natural Blueberry Flavor 16oz. (472 ml) Liquid Calcium Magnesium Citrate Plus Vitamin D3 provides 1200 mg of calcium and 600 mg of magnesium in a 2:1 ratio, plus 800 IU of vitamin D3 from lanolin in one delicious, naturally flavored liquid formula. Bluebonnet Nutrition Liquid Calcium Magnesium Citrate is available in three tasty natural flavors including blueberry, lemon, and orange. Easy Assimilation & Absorption.