Vitamin D: Too much of a good thing?

A three year study into the effects of taking large doses of vitamin D shows the supplements can cause a moderate reduction in bone mineral density (BMD). A low BMD reading is a potential indicator of heightened risk of bone breakage or osteoporosis. The study, which began in 2013,  looked at healthy men and women between 55 and 70 years old. Researchers at Calgary’s Cumming School of Medicine randomly split patients into three groups. Doctors Stephen Boyd (PhD) and David Ha