Sunlight, Vitamin D and Health
Do Your Body a Favor—Get Out and Enjoy the Sunshine!
The main function of vitamin D is to maintain the body’s calcium concentrations at a precise level. This is accomplished by increasing the absorption of calcium from the intestines and the interaction with other hormones (such as parathyroid hormone).
Almost all tissues and cells in the body have receptors for this hormone, and therefore are affected by its presence. More than 90% of the vitamin D requirement of human beings is met by internal synthesis with the aid of sunlight, not from the diet.
Vitamin D deficiency will cause a disease characterized by the severe bone deformity called rickets. Osteomalacia (a weakening of the bones) may develop – along with muscle weakness and aching bones and muscles (as in fibromyalgia, CFS and arthritis).