Organoleptic, physicochemical, microbiological, technological properties, as well as quality and safety indicators are determined in the hygienic toxicological examination of food additives. The immunological activity of the "Mella croissan" feed additive was studied. Food mixture at a dose of 413 mg/kg did not have a negative effect on the amount of IgG and IgM class immunoglobulins in the peripheral blood serum of experimental animals. Keywords: health, hygiene, toxicology, biologically active supplement, immunoglobulin, blood serum, food industry