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 .
Peripheral computed tomography (pQCT) detected short-term effect of AAACa (heated oyster shell with heated algal ingredient HAI): A double-blind comparison with CaCO3 and placebo
Abstract : Trabecular bone density at the distal radius and cortical bone density at the midradius were measured in four r and omized groups of women before and after 4 months administration of AAACa , oyster shell heated under reduced pressure with addition of heated algal ingredient ( HAI ) ( group A ) ; AACa , the same preparation without HAI ( group B ) ; CaCO3 ( group C ) ; and placebo ( group D ) in a double-blind system using peripheral quantitative computed tomography ( pQCT ) with lumbar spine density measurement by dual-energy X-ray absorptiometry ( DXA ) . Groups A , B , and C received 900 mg/day elemental calcium and D received none . In subjects of group A , but not B , C , and D , radial trabecular bone density increased significantly , to 106.2 % ± 2.1 % of the initial value ( mean ± SEM ) . The increase of trabecular bone density was significantly different from the placebo group ( D ) only in AAACa ( group A ) and not in AACa ( group B ) and the calcium carbonate ( group C ) . Cortical bone density increase was also greater in group A ( but not in B and C ) than in D. Lumbar spine density did not change significantly . AAACa was apparently more effective , increasing trabecular bone density more than AACa and CaCO3 containing the same amount of elemental 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 .