Vitamins are micro nutrients that are essential to proper body function. They are involved at low concentrations in many vital processes. Overview of vitamins Vitamins play a major role in the energy metabolism, the muscle and brain functions, and in preventing certain diseases. Deficiencies of vitamins can occur in various situations: Dietary imbalances Physical activities Winter season Excess use of coffee, tea, alcohol, tobacco, etc. The most important sources of vitamins are fruits and vegetables, oilseeds, cereals, fish, eggs, and meat. Occasional supplementation may be necessary to optimize the body function. The most important sources of vitamins are fruits and vegetables, oilseeds, cereals, fish, eggs, and meat. Fat-soluble vitamins These vitamins bind to the lipids eaten and are absorbed together with the fatty acids. They are stored in fatty tissues, so that they stay in the body for several days, or even several months. Water-soluble vitamins...