Ethical Nutrients MEGAZORB Bone Builder with Vitamin D may assist in the prevention & treatment of Osteoporosis. Ethical Nutrients MEGAZORB Bone Builder with Vitamin D, a high strength calcium supplement that may assist in the prevention and treatment of Osteoperosis. A source of calcium from hydroxyapatite, MEGAZORB Bone Builder with Vitamin D may: Assist in the prevention and treatment of osteoporosis. Strengthen bone in children and older adults. Enhance bone mineral density. Reduce bone loss in postmenopausal women. Reduce the risk of osteoporosis and osteoporotic fractures in older people.