The biological action of vitamins, herbs and minerals original nutritional supplements produced by Mineral Resources International (USA) was experimentally assessed in laboratory rats which were under long-term exposure to incorporated low level Cesium-137 radionuclide ( 137 Cs) radiation at 1200 Bq and immobility stress. The influence of the studied complex on accumulation and elimination of 137 Cs, the level of hormone activity in blood, lipid peroxidation processes in endocrine organs, hypothalamus, as well as in the liver and lungs were assessed. The morphofunctional state of the brain and endocrine organs was also studied. It was revealed that the tested nutritional supplements can reduce 137 Cs accumulation from 4.09 Bq/g in the non-treated group to 2.76 Bq/g in the treated group of rats after 4 weeks exposure to 137 Cs. They also promote the normalization of the lipid peroxidation processes and prevent dystrophic and destructive changes in endocrine organs both on the blood microcirculatory surfaces and in secretory cells.

        Key words: radioprotectors, nutritional supplements, lipid peroxidation