Organic contaminants Organic contaminants Vitamins are important components of the diet.
Vitamins are organic micronutrients that are part of food, essential for the development of body functions. These micronutrients are not synthesized by the body or are synthesized in insufficient quantities. Vitamins are essential nutrients having roles in: maintaining the defense barrier in the mucous membranes and increasing resistance to infections; metabolism of proteins, carbohydrates, lipids and minerals; synthesis of indispensable structures nucleic acids and nucleoproteins in the DNA molecule, enzymes, coagulation factors ; oxidation processes antioxidant effect and atherogenesis antiatherogenic effect.
Animal or plant foods contain variable types and amounts of vitamins, so a food deficiency can be associated with vitamin deficiencies. The varied diet provides the necessary vitamins without the need to supplement them. For humans there are 13 vitamins, divided into two groups, the four fat-soluble A, D, E and K and the nine water-soluble eight B vitamins and vitamin C.
Clasificarea vitaminelor: 1.
Fat-soluble Fat-soluble vitamins which dissolve only in fatthey are stored in adipose tissue and in the liver. Vitamins of this type can be stored in the body for days and even months. Water-soluble Water-soluble vitamins which dissolve in waterthese vitamins do not spend much time in the body.
The body cannot store them and the excess is excreted in the urine. This leads to the need to ingest them in a larger quantity and with a higher water soluble vitamins.
Vitamin-like food factors Vitamin-like food factors have similar characteristics to vitamins, but do not meet all the criteria for vitamins: they can be synthesized by the body, they can be essential for certain periods of body development.
Vitamin-like dietary factors are: carnitine, choline, myoinositol, ubiquinone coenzyme Q10bioflavonoids.