The body needs several vitamins to function properly, most of which are obtained from food. Vitamins and minerals are called micronutrients and are needed in small amounts. Unlike macronutrients, which provide energy (carbohydrates, proteins, fats), micronutrients do not provide calories but are essential for health.
Vitamins B and C are called water-soluble vitamins because they dissolve in water and are transported in the body by watery fluids.
Vitamin D is one of the fat-soluble vitamins, like vitamins A, E, and K. This means that they do not dissolve in water, like oil, but is instead absorbed by the body’s fatty tissues.
Only a small part of our vitamin D intake comes from our diet. Most are produced by the body when the skin is exposed to the sun. This means that there is a risk of deficiency, especially in autumn and winter.