According to the Oct 8, 2013 research by American Society for Bone and Mineral Research, low calcium intake, 621 mg per day has higher total mortality compared to those in the highest quartile, more than 1565 mg.
"[Based on these findings], clinicians should continue to evaluate calcium intake, encourage adequate dietary intake, and if necessary, use supplements to reach but not exceed recommended intakes," Douglas C. Bauer, MD, from the University of California, San Francisco, the lead author of the first study, told Medscape Medical News.
Another recent clinical trend is to recommend high doses (more than 1000 IU) of vitamin D, although studies comparing high- and low-dose (400 - 800 IU) vitamin D suggest low dose is more beneficial, they conclude. vitamin D: supplementation to prevent osteoporosis in healthy adults is not warranted. However, maintenance of vitamin D stores in the elderly combined with sufficient dietary calcium intake (800–1200 mg per day) remains an effective approach for prevention of hip fractures."
