USP Promotes Bone Health Vegetarian Formula Dietary Supplement Laboratory Tested Guaranteed QualityCalcium is the primary mineral responsible for strong bones. The body also uses Calcium for proper muscle contraction and nerve function. Because the body cannot produce Calcium, a balanced diet, regular exercise, healthy lifestyle choices and adequate intake of Calcium can play a role in maintaining bone health. Calcium and Magnesium play essential roles in maintaining proper bone mineralization. Calcium and Magnesium are also involved in muscle contractions and nerve impulse. Zinc is essential for cell division and growth.