A new review of research on calcium supplements is raising new health concerns for people who take them regularly to prevent bone loss. Researchers re-analyzed data on over 10,000 adults and found that calcium supplements appear to provide limited bone health benefits to people over the age of 40, and they appear to increase the risk of heart attacks by nearly 30 percent, according to HealthDay.
"It is not clear whether [calcium supplements] really increase the risk of heart attacks or strokes," said John Cleland, author of an editorial accompanying the report in the British Journal of Medicine. However, "they do appear to be a waste of time and effort, and we should probably stop using them."
Unlike calcium intake from dietary sources, supplements can increase the level of calcium in the blood, which may heart attack risk. Researchers recommend people get calcium naturally through dairy products, green leafy vegetables, and other dietary sources. The assumed health benefits of supplements in general continue to face scrutiny by the scientific community.