It is the most important form of vitamin D, which reduces the occurrence of osteoporosis in adults and rickets in children. Vitamin D deficiency can also influence the appearance of heart disease, cancer and diabetes. Characteristic symptoms of Vitamin D deficiency can include fatigue, weakness and muscle pain, joint discomfort and chronic depression. A significant percentage of the population suffers from vitamin D deficiency in adulthood and supplementation is currently an indication for almost the entire population.
