The study was conducted on 28 growing female Wistar rats, fed ad libitum for 84 days with four different diets: preferred poor, preferred rich, recommended and Labofeed B. The diet intake, feed efficiency, weight/length ratio, serum TG, TC and HDL-C levels were determined. Results were verified statistically using one-way ANOVA and the Scheffe test. The poor preferred diet with predominating fruit and vegetables, in comparison to the rich preferred diet, containing sweets, lowered the risk of obesity and atherosclerosis. The recommended diet, based on the model food ration for girls aged 13-15 years, lowered the risk of these diseases too.