D3 Hd Oral Drops 30ml is used for supporting overall bone health. It is a Vitamin D supplement used to help regulate calcium and phosphate metabolism in children. It may help reduce Vitamin D deficiency, which can arise due to poor nutrition, malabsorption, or insufficient exposure to sunlight. The presence of Cholecalciferol (Vitamin D3) helps ensure proper bone mineralisation and promote healthy growth by aiding calcium absorption. It also helps in supporting a strong immune system and reducing cartilage damage.