Vitamin D-is the sun enough for us?

Vitamin D is the easiest available of the exogenous vitamins, just to go outside on a sunny day …. This, of course, is a simplification, but it raises some considerations, such as whether enjoying the beautiful weather during summer will provide us with adequate vitamin D during the dark winter, without the need for additional supplementation. Some sites in the organism provide the long-term supply of calcidiol to serum, such as the adipose tissue or muscles. The questions are: are our "internal storage" of vitamin D efficient? For how long will this storage last? Which of the sources-the sun or oral supplementation is better? In this article, the author also tried to raise a subjects as follows: the doses of vitamin D that the sun provide us with and the form of vitamin D appropriate for the possible formation of its storage in the body. The following conclusions can be drawn: skin synthesis as the sole source of cholecalciferol does not guarantee the maintenance even of a minimal recommended serum calcidiol levels throughout the year. The supplemented doses should be correlated with the determined level of calcidiol in serum. The conducted research shows that vitamin D