Effects of addition (19.4%) of naked oats (cultivar Akt) to a diet in which wheat grains and some corn and barley grits had been substituted with wheat flour and sucrose, on the contents of the carbohydrate-lipid metabolism products and on the body weight growth and accumulation of pericardial and peri-intestinal adipose tissue were studied in rats. The addition of naked oats to the rats diet was found to result in significantly decreased contents of glucose (from 153 to 132 mg/dL), triacylglycerols (from 217 t0 141 mg/dL), total cholesterol (from 75 to 60 mg/dL), and total lipids (from 460 to 352 mg/dL) in the blood serum of treatment rats, compared to the rats fed a non-enriched diet. At the end of the experiment, females fed the oat-enriched diet showed a significantly lower body weight growth. Significantly lower amounts of pericardial fat were revealed in males and females fed the oat-enriched diet, compared to the control animals the diet of which contained no oats.