Calcium supplements are associated with an increased risk of heart attack, stroke and early death

Published in the BMJ 2010; 341:c3691 doi: 10.1136/bmj.c3691 (Published 29 July 2010)

Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis
Mark J Bolland, senior research fellow1, Alison Avenell, clinical senior lecturer2, John A Baron, professor3, Andrew Grey, associate professor1, Graeme S MacLennan, senior research fellow2, Greg D Gamble, research fellow1, Ian R Reid, professor1
1Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92 019, Auckland 1142, New Zealand
2Health Services Research Unit, University of Aberdeen
3Department of Medicine, and Department of Community and Family Medicine, Dartmouth Medical School, NH, USA

This paper can be accessed at: http://www.bmj.com/content/341/bmj.c3691.full
 
Bolland studied 15 trials to investigate whether calcium supplements increase the risk of cardiovascular events.
 
He found that calcium supplements are associated with an increased risk of heart attack, stroke and early death.

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