* Calcium Supplement * High Potency * Once Daily Calcium * Supports Bone Health * Vitamin D3 Added to Assist Calcium Absorption * Guaranteed Quality - Laboratory Tested Calcium is an important mineral for supporting good bone health. Calcium also works to support healthy muscle and nerve function. Vitamin D3 is added to assist with calcium absorption and as support for healthy immune function. Adequate Calcium and Vitamin D3 as part of a healthful diet, along with physical activity, may reduce the risk of osteoporosis in later life.