Vitamin D – plays a role in the regulation of calcium-phosphorus management. Among other things, it facilitates intestinal calcium absorption and affects the bone mineralization process. Vitamin D occurs in two basic forms D2 (ergocalc -digit) i D3 (cholekalcyferol). The first is also created under the influence of ultraviolet rays from ergosterol, which is widespread in the plant world, the other (D3) -under the influence of sunlight from the already mentioned 7-dehydrocholesterol found in the skin. Both forms of vitamin D are equivalent in terms of physiological influence.
Vitamin D deficiencies are quite common in children and pregnant and lactating women. Delivering this group of people with the right amount of vitamin D along with food is quite difficult and often becomes the need to vitaminize food products. Vitamin D deficit also occurs in people, which are very little in sunlight, e.g.. In connection with the work performed.
For the above -mentioned groups of people, it is recommended to deliver OK with food. 400 j.m. vitamin D per day (100 j.m.= 2,5 ng vitamin D).