Physical indexes of rats. Control group: normal diet; model group: high-fat diet; hsryfm 1301 group: high-fat diet + L. rhamnosus hsryfm 1301-containing skim milk suspension; hsryfm 1301-f group: high-fat diet + L. rhamnosus hsryfm 1301-containing skim fermented milk. A: Weight gain of the rats in 56 d; B: Food consumption of the rats in 56 d; C: Efficiency of diet utilization of the rats; D: Serum TC, TG, HDL-C and LDL-C concentration in the rats. Efficiency of diet utilization (%) = (Weight gain/Food consumption) × 100. Each value is the mean ± standard deviation (n = 8). A different superscript letters means significant difference in the same index (P < 0.05).