Vitamin D helps maintain muscle strength

... recently, doctors in the field weren't sure why. Today, they believe the problems may be related to low levels of vitamin D. "And you see it on the other end of life when elderly patients are institutionalized," he adds. "It's estimated that one ...

http://www.miamiherald.com/2013/03/27/3309601/vitamin-d-helps-maintain-muscle.html