Quanto-D3 60K Capsule is used to treat Vitamin D deficiency. Quanto-D3 60K Capsule effectively treats various conditions in the body like Vitamin D deficiency, osteoporosis (weak and brittle bones), and osteomalacia (softening or deforming of bones due to lack of calcium). Vitamin D deficiency occurs when your body has low Vitamin D levels and is caused by inadequate nutrition, intestinal malabsorption, or lack of sunlight exposure.