Vitamin D, essential and important for the body

What foods contain vitamin D? This is a question I am often asked, but before answering it, let's try to better understand how this vitamin, or rather this hormone, works and why it is so important for our well-being. Vitamins, as well as minerals, represent so-called "micronutrients," which in our bodies form a kind of "spider's web" and contribute to the proper functioning of all organs. Vitamins, in particular, are catalysts and help various parts of the body function better. From an energy point of view, there are more yin vitamins (the water-soluble ones, for example, B and C) and more yang vitamins (the fat-soluble ones, namely A, D, E and K).