kirkman's purest calcium with vitamin d-3 || 454 gm/ 16 oz powder - unflavored - hypoallergenic || minerals || gluten and casein free | tested for more than 950 environmental contaminants kirkman <b>supports heart function, circulation, nerve function, bone mass and muscle tone. this is an unflavored calcium powder made from a blend of calcium carbonate and calcium citrate with vitamin d-3. the powder mixes easily in food or beverages and can be used in baking at moderate temperatures. hypoallergenic. gluten and casein free. ultra tested.</b><br/><br/> calcium is a mineral that is an important component of a healthy diet and necessary for life. approximately 98% of the body’s calcium is stored in bones and teeth. calcium is critical for building bones and teeth during childhood and for maintaining strong bones and teeth thereafter. in the rest of the body, calcium supports heart function, circulation, nerve function and muscle tone. <br/><br/> vitamin d increases the absorption of calcium, so it is important to make sure your diet contains sufficient amounts of that nutrient. <br/><br/> kirkman’s calcium capsules use bisglycinate amino acid chelate, which has been demonstrated to have superior absorption qualities.