Bio-D3 Capsule belongs to a group of medicines called 'vitamin D metabolites' primarily used to treat low blood calcium levels. Bio-D3 Capsule effectively treats various conditions caused by low calcium levels in the body, such as osteoporosis (weak and brittle bones), osteomalacia/rickets (weak bones), hypoparathyroidism (low levels of parathyroid hormone), and latent tetany (a muscle disease with low blood calcium levels). Bio-D3 Capsule can also be given to pregnant, nursing, and postmenopausal women to ensure that they are getting enough calcium. Additionally, Bio-D3 Capsule is used to treat hyperparathyroidism (overactive parathyroid glands) and metabolic bone disease in people with chronic kidney disease, surgery, or other conditions.