“…Undernutrition, or malnutrition, is formed due to quantitative and especially due to qualitative in adequacy of nutrients and nutritional energy, in conditions of depletion of their internal reserves and compensatory metabolic pathways (Bashun et al, 2020). Undernutrition can be subdivided on the basis of a number of criteria, including anthropometry data, dynamics of growth and development, its etiology and pathogenesis, influence on development and function, severity (Gandaeva, 2015). Some examples of different types of undernutrition are wasting, thinness, child stunting, vitamin deficiencies, mineral deficiencies (FAO et al, 2019), as well as pathological conditions and diseases caused by them (anemia, scurvy, goiter, etc.)…”