Researchers have shown that taking calcium supplements has minimal impact on bone health. However, it is recommended for the elderly.
What if calcium had only a limited effect on healthy bones? This is the conclusion of New Zealand researchers in a study published in the BMJ, against popular belief.
In France, ANSES recommends taking 1200 mg of calcium daily for people over 55, through the consumption of dairy products and calcium-based food supplements.
1 to 2% more
Until now, it was thought that following this advice could reduce the risk of fractures, and increase bone density in seniors. The team of researchers carried out two successive meta-analyzes in order to verify this hypothesis, and to determine whether calcium is really beneficial.
In the first case, 59 studies, which looked at people taking calcium supplements, were reviewed. Conclusion : The density of their bones increases by only 1 or 2% compared to a person who does not take calcium in addition. Insufficient results to prevent the risk of fracture.
No significant reduction
The second meta-analysis is based on 44 studies, the aim of which was to assess the links between increased calcium intake and the likelihood of bone fracture.
The results indicate that there is actually no evidence that taking calcium significantly reduces the risk of fractures.
In a editorial published at the same time as these results, Pr Karl Michaëlsson of the University of Uppsala in Sweden, observes that these results make recommendations on calcium intake illogical. Especially since if the benefits for good bone health are minimal, the risks of cardiovascular disease and constipation, on the other hand, increase with the intake of calcium.
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