Micronutrients (trace elements) – a number of chemical elements present in small quantities in plants, animals and people, necessary for their life and development, including boron, chromium, zinc, fluorine, iodine, cobalt, magnesium, manganese, copper, potassium, selenium, sodium, vanadium, calcium, iron and other. (A detailed description of the individual elements contained under their names). Supplementation of micronutrients in the body allows its correct functioning. Trace elements are used as complements of supplements.