Calcirol Sachet is used to manage vitamin D deficiency. It is also recommended to maintain strong bones and improve bone mineral density in people with osteoporosis and bone disorders. The presence of vitamin D3, a fat-soluble vitamin, helps the gut to absorb calcium from food. It also helps the body to maintain adequate levels of two minerals essential for bone health, calcium and phosphorus. This further enables the body to preserve bone health. The body makes vitamin D when our skin gets exposed to sunlight. Sunscreen, protective clothing, limited exposure to sunlight, dark skin, and age may reduce the absorption of the sun