Calcium with Vitamin D3 makes your bone healthy while always remaining gentle and mild, even to sensitive stomachs Blood Function: Calcium also aids in mediating the constriction and relaxation of blood vessels, muscle contraction and secretion of hormones Better Absorbed Calcium for Men and for Women: Meets daily Calcium requirements. Vitamin D supports maximum calcium absorption from Calcium Carbonate Best Formula: you will get the benefits of Calcium and Vitamin D3. It is ideal for promoting bone, muscle and nerve health