Calcium supplements  increased BMD by 0.7 - 1.8 % at all five skeletal sites at one , two , and over two and a half years , but the size of the increase in BMD at later time points was similar to the increase at one year .
Increasing calcium intake from dietary sources or by taking calcium supplements produces small non-progressive increases in BMD , which are unlikely to lead to a clinical ly significant reduction in risk of fracture
OBJECTIVE To determine whether increasing calcium intake from dietary sources affects  bone mineral density ( BMD ) and , if so , whether the effects are similar to those of calcium supplements .
Increase of bone mineral density by calcium supplement with oyster shell electrolysate.
The effect of calcium supplementation , in patients with osteoporosis is still a matter of controversy . Oyster shell electrolysate ( OSE ) was reported to raise serum calcium and increase urinary calcium excretion in vitamin D-deficient states more readily than calcium carbonate . Since the effect of calcium salts on osteoporosis depends heavily on its bioavailability , the effect of 900 mg/day calcium as OSE was tested in 12 elderly osteoporotic females , using radial bone mineral density measured by single photon absorptiometry and spinal trabecular bone density measured by quantitative computed tomography ( QCT ) as indicated , in comparison with 21 untreated controls in the same geriatric hospital .  Radial bone mineral density significantly increased from the pre-test value after 12 and 24 months in subjects given OSE by paired t-test , whereas it fell significantly in the controls . The spinal QCT value on OSE  did not change significantly in either the subjects under treatment with OSE , or the controls . Thus OSE may favorably influence osteoporosis by providing a readily available source of calcium
Calcium supplements  increased BMD by 0.7 - 1.8 % at all five skeletal sites at one , two , and over two and a half years , but the size of the increase in BMD at later time points was similar to the increase at one year .
Increasing calcium intake from dietary sources or by taking calcium supplements produces small non-progressive increases in BMD , which are unlikely to lead to a clinical ly significant reduction in risk of fracture
OBJECTIVE To determine whether increasing calcium intake from dietary sources affects  bone mineral density ( BMD ) and , if so , whether the effects are similar to those of calcium supplements .