Vitamin D contributes to the maintaining of normal levels and the exchange of calcium and phosphorus, which in their turn are very important for the bone mineralization, the work of the muscles, the nerve conduction. It is needed for the proper functioning of the cellular functions.

Human organism procures the basic quantities of it synthesizing it in the skin under the influence of sunlight. This process should be taken into account when comparing the recommended daily intake and the amount generated from the food.

The prolonged vitamin D deficiency increases the risk of rickets, osteoporosis, non-assimilation and rebalance of the calcium and phosphorus exchange in the body.

The main food sources of vitamin D are eggs, certain fish, milk.