Caldiron tablet is used to ensure adequate supply of calcium to bones.It contains Calcium Carbonate and Vitamin D3(cholecalciferol). Role of key ingredients: Calcium Carbonate is used to prevent or treat low blood calcium levels in people who do not get enough calcium from their diets. Calcium Carbonate is important for growth and development of bones and promotes enamel formation in teeth. Vitamin D3 is well known for its anti-osteoporotic activity. Vitamin D3 enhances the efficiency of calcium absorption. Therefore, vitamin D3 supplementation is expected to protect against osteoporosis and fractures in those with occult vitamin D3 deficiency. Caldiron is used in elderly people to keep bones healthy and strong, and is even effective in Chronic arthritis and Osteoporosis.Caldiron is also used in elderly people to keep bones healthy and strong, and is even effective in Chronic arthritis and Osteoporosis. Use under medical supervision.