1. An oral dietary supplement having a calorie content in the range of 0.8-1.5 kcal / ml, an osmolality in the range of 390-630 mOsm / kg of water, and containing a protein source of about 16-25% of the calories of the composition, a carbohydrate source of about 34-68% of the calories of the composition, and a lipid source of about 15-44% of the calories of the composition and probiotic microorganisms. 2. An oral dietary supplement according to claim 1, containing a source of lipids with a ratio of fatty acids n6: n3 in the range from 2.3: 1 to 5: 1.3. An oral dietary supplement according to claim 1, containing about 82-88% free water. The oral dietary supplement of claim 1, wherein the protein source is selected from milk protein concentrate, milk sodium and calcium caseinates, L-arginine, or combinations thereof, and which has an NPC: N ratio in the range of 75: 1 to 130: 1.5. The oral dietary supplement of claim 1, wherein the probiotic microorganisms comprise non-replicating probiotic microorganisms. Oral dietary supplement according to claim 1, containing probiotic microorganisms in an amount corresponding to from about 10 to 10 CFU. The oral dietary supplement of claim 5, wherein the non-replicating probiotic microorganisms are rendered non-replicating by heat treatment, preferably by high-temperature treatment, at least at 71.5 ° C. for at least 1 s. The oral dietary supplement of claim 7, wherein the heat treatment is a high temperature treatment at a temperature of about 71.5-150 ° C. for about 1-120 s, and is preferably a high temperature / short term (VTKV) treatment or ultra high temperature (UHT) r1. Пероральная диетическая добавка, имеющая калорийность в диапазоне 0,8-1,5 ккал/мл, осмоляльность в диапазоне 390-630 мОсм/кг воды, и содержащая источник белков, составляющий около 16-25% калорий композиции, источник углеводов, составляющий около 34-68% калорий композиции, и источник липидов, составляющий около 15-44% калорий композиции и пробиотические микр
