1. decreases the elevated rate of bone turnover typically seen in 
  2. postmenopausal women with osteoporosis
  3. increase levels of serum calcium, with compensatory reductions 
  4. in serum parathyroid hormone (PTH) and an increase in urinary calcium
  5. act on the kidneys and the parathyroid glands
  6. vitamin D3 in stimulating intestinal calcium transport
  7. correction of hypocalcemia and secondary hyperparathyroidism
  8. stabilizing macromolecular structure and synthesis.
  9. produced in the kidney from the vitamin D metabolite, 
  10. 25-hydroxyvitamin D3 (25(OH)D3). Vitamin D is important
  11.  for the absorption of calcium from the stomach and for the functioning of calcium in the body.