Adequate Calcium In blood is so vital to a wide variety of bodily functions that our internal biochemistry will not tolerate a deficiency even for short periods. Clinical evidence suggests that Calcium Is useful for the prevention and treatment of Osteoporosis and associated fractures. Vitamin D3 is also essential for healthy bone as it aids in Calcium absorption from the Gl tract. In addition to this it stimulates bone formation. Clinical studies also show that Calcium and Vitamin D3 has synergistic effects on bone growth as well as in Osteoporosis and fracture prevention.