Calcium supplements do not reduce risk of fractures

摘要

Increasing calcium intake beyond a normal balanced diet does not prevent fractures, according to two studies from New Zealand published in The BMJ on 29 September 2015. The first study (2015;351:h4183) was a systematic review and meta-analysis of 59 randomised controlled trials of dietary sources of calcium or calcium supplements, with or without vitamin D, in participants aged over 50 years. It showed that increased dietary or supplementary calcium produced only limited improvement in bone density - even when calcium was combined with vitamin D at any dose - and that these small increases were unlikely to lead to any clinically meaningful reductions in fractures.