Аннотация:The results of investigation of 24-epibrasinolide toxicological properties within acute experiment with white mice of both sexes are presented. 24-Еpibrasinolide is а steroid plant hormone. It was noted that mean lethal dose of 24-epibrasinolide added to the diet was above 5 000 mg/kg. The effect of high dose of 24-epibrasinolide on lipidic and protein metabolism in white mice was found.