Calm D3 tablet is used to ensure adequate supply of calcium to bones.It contains Calcium Carbonate and Vitamin D(calcitriol). Calcium carbonate is a mineral that is required for the formation of bones and maintaining them. Calcium carbonate is required to prevent breakage of bones. Calcium is used to prevent or treat low blood calcium levels in people who do not get enough calcium from their diets. Vitamin D helps the body absorb calcium and phosphorus. Having the right amounts of Vitamin D, Calcium, and Phosphorus is important for building and keeping strong bones. Calm D3 is a nutritional supplement which can be taken by people who have low levels of calcium in their blood. Calm D3 is used in elderly people to keep bones healthy and strong, and is even effective in Chronic arthritis and Osteoporosis. Use under medical supervision.