Effects of permethrin treatment on body weight (A), weight gain (B) and energy intake (C). Mice were treated with either control or permethrin [50, 500, and 5000 μg/kg body weight (BW)/day] in either low fat or high fat diet for 12 weeks. (A) Open symbols, low fat diet-fed mice; Filled symbols, high fat diet-fed mice. Circles, control; Up-triangles, 50 μg/kg BW/day; Down-triangles 500 μg/kg BW/day; Squares, 5000 μg/kg BW/day. Values represent means ± S.E. (n= 5–8). Means with different letters are significantly different (P<0.05).