The Sun is the star closest to the Earth. That's why we know so much about it. We also know that it is thanks to the sun that all the plants and animals on our planet, and even we ourselves, are alive. In fact, the sun is so important that it conditions our lives to the extent of telling us when to get up and when to go to bed.
Of course, it goes without saying that its effect on our bodies is highly beneficial. It stimulates the production of vitamin D, which is essential for developing bones, it benefits many of our vital body functions and it even stimulates the brain (and our spirit: "it's good for the soul").
However, we have to be careful because not everything is that good. In summer we usually go to the beach and sunbathe, and in winter when we go skiing we also notice something special about the sun. Its effects can be more harmful than we think.