This supplement is used to treat and prevent conditions related to calcium deficiency: Osteoporosis & Osteopenia: Preventing brittle and weak bones in the elderly and postmenopausal women. Hypocalcemia: Treating low calcium levels in the blood. Bone Fractures: Promoting faster and stronger bone healing after an injury. Rickets & Osteomalacia: Softening of the bones due to severe Vitamin D deficiency. Pregnancy & Lactation: Supporting the skeletal development of the fetus and replenishing the mother?s calcium stores.