Vitamin D3 is produced by the photolytic action of ultraviolet radiation on the skin. Despite the fact that every body can produce vitamin D3, modern lifestyles and inadequate exposure to sunlight results in the impoverishment of vitamin D3, which must necessarily be obtained through diet, and its role in maintaining body in good condition is important.
Vitamin D3 is an essential role in maintaining the homeostasis of calcium and phosphorus and, therefore, in maintaining healthy bones and teeth. Moreover vitamin D3 involved in the metabolism of tissues and its presence in sufficient quantities, is essential for the differentiation of cells and maintaining the functionality of the membranes and for the functioning of various organs such as skin, muscle, pancreas, nerves, the parathyroid gland and the immune system
