Lipid peroxidation products are capable of inhibiting the activity of enzymes of glycolysis and oxidative phosphorylation, inhibiting the synthesis of protein and nucleic acids, inhibiting many membrane-bound enzymes and thus exerting a pronounced damaging effect on cells and the body as a whole. It is of particular interest to study the intensity of lipid peroxidation in the body during myocardial infarction, which was the price of this study.