Vitamin D: Are You Getting Enough?

Physical symptoms may include persistent headaches, stomach distress and general malaise for which there are no apparent cause.">depression and infectious diseases like colds and the flu. Vitamin D helps immune system cells destroy the bacterium that causes tuberculosis, increases production of insulin and enables heart cells to contract. Low levels may even be a risk factor for preeclampsia, a potentially fatal condition that occurs in late pregnancy. In fact, nearly every cell in the body expresses receptors for vitamin D, meaning the vitamin plays some role in the normal activities of that cell.