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High Calcium Intake May Not Help Prevent Fractures, Reports The Harvard Health Letter
For years, getting a lot of
calcium has been portrayed as one of the best things you could do to
prevent osteoporosis and related bone fractures. Small study results
supported this view. But when researchers started to crunch the data from
large, prospective studies that followed people for many years, the
benefits weren't so clear-cut, reports the March 2008 issue of the Harvard
Health Letter.
The ambiguity led to trials to test what effect calcium might have on
fracture rates. Two studies showed that calcium didn't prevent fractures --
even when taken in combination with vitamin D. Another study showed that
postmenopausal women who took a calcium-vitamin D combination were no less
likely to break their hip than women who took a placebo pill. And other
researchers reported the results from a meta-analysis of studies on calcium
that found no connection between high calcium intake and lower hip fracture
risk.
While a certain level of calcium intake is undoubtedly important to
keeping bones strong, amounts above that level might not do much good,
notes the Harvard Health Letter. One reason some of these studies on
supplements may not have shown a benefit is because the study participants
were already getting over 1,000 milligrams (mg) of calcium daily through
diet.
The bottom line: According to current recommendations, Americans over
50 are supposed to get 1,200 mg of calcium daily, but 600 mg is probably
enough for most people to keep their fracture risk low. Still, because
extra calcium might be protective against colon cancer, a daily intake of
600 to 1,000 mg is a reasonable goal.
Harvard Health Letter
Harvard Health Letter
High aportul de calciu nu poate ajuta la prevenirea fracturilor, rapoarte de la Harvard scrisoare de sãnãtate - High Calcium Intake May Not Help Prevent Fractures, Reports The Harvard Health Letter - articole medicale engleza - startsanatate