Liquid Calcium with Vitamin D by Schiff/Bio Foods.This formula combines both calcium and vitamin D in order to promote bone and teeth health. Calcium is vital for building strong bones and teeth. Calcium is also needed for muscle function, nerve function, release of hormones and to Enhance the function of many enzymes. Vitamin D regulates the absorption of calcium. This product combines several forms of calcium in easy -to-swallow softgels.