Vitamins are the substances necessary for the body to ensure its normal functioning. There are more than 30 such substances, and all of them are vital for the human body, being part of all tissues and cells, activating and determining the course of many processes. Vitamins increase the body's resistance to infectious diseases, interfere with the processes of aging, atherosclerosis, regulate normal homeostasis, determine the activity of enzymes, participate in the metabolism of amino acids, fatty acids, mediators, hormones, phosphorus compounds, trace elements.