Not getting enough vitamin D can weaken bones, teeth, and muscles by interfering with calcium absorption. Lack of the vitamin has also been implicated in dementia and an increased risk of colorectal cancer. Now there's another reason to avoid a serious D deficiency: it can make respiratory tract infections much worse, according to a new study. Continue Reading Category: Illnesses and conditions, Body and Mind Tags: Lung, Pneumonia, Respiratory health, University of Surrey, University of Oxford, University of Reading, Vitamins and minerals http://dlvr.it/TQWwvf