The effect of the amino acid complex "VitaAmin" on the biochemical parameters of white mongrel mice in different dosages was studied. The experience is organized in a vivarium at the Department of Surgery, Obstetrics, Pharmacology and Therapy for 60 days. 4 groups of 10 mice were formed: the 1st group (control) did not receive "Vitaamine", the 2nd, 3rd and 4th groups addi-tionally administered "Vitaamine" in dosages: 0.02, 0.04, 0.06 ml per head once a day. The experi-ment involved 40 white mice. Analysis of the results showed that it is better to feed the amino acid complex "VitaAmin" as an additive to the diet in the range of 0.02-0.04 ml per head once a day. This rate of feeding the drug is safe and most effective. The use of a dosage of 0.06 ml / head / day contributes to a more intense work of the liver of animals and a violation of the structure of its cells, has a toxic effect on the body of mice.