CORABON D 500/200IU is a combination medication primarily used to treat vitamin D deficiency or insufficiency. It contains two active ingredients: Vitamin D3 (Cholecalciferol) and Calcium. The formulation provides 500 mg of calcium and 200 IU of vitamin D3 per tablet, which helps in the absorption of calcium and supports bone health. Vitamin D3 is essential for the proper absorption of calcium from the gastrointestinal tract, while calcium plays a crucial role in maintaining strong bones and teeth, muscle function, and nerve transmission. CORABON D is often prescribed to patients who are at risk of osteoporosis, or those who have low levels of vitamin D and calcium, especially the elderly, postmenopausal women, or individuals with limited sun exposure. This medication is usually taken under the guidance of a healthcare professional.