The effect of introducing soluble dietary fiber (5% inulin) into the diet on correcting vitamin D and group B deficiency and its consequences has been studied. The study was conducted on growing male Wistar rats (body weight 51.4 ±0.5 g) after they had a deficiency caused by a decrease in the content of vitamins D and group B in a vitamin mixture of a semi-synthetic diet for 23 days. The improvement of the rodent slim down with inulin did not influence the retention of vitamins A and D by lacking creatures amid the 7-day adjustment of vitamin status, whereas to some degree abating the reclamation of ordinary vitamins B1 and B6 urinary excretion, and B2 brain substance. At the same time, the substance of vitamin E within the liver was diminished by 1.48 times compared to the control bunch, the concentration of press within the blood plasma was expanded by 32.7, within the liver by 42.6, the substance of manganese within the brain was extended by 1.5 times, which does not surpass the physiological standard. This demonstrates the convenience of improving the slimming down of individuals with a pressing lack of inulin while enhancing with vitamins E and group B.