(A) Rapamycin levels in the blood after 2–4 weeks on placebo or rapamycin-containing diets, (B) Body weight gain was measured weekly for the duration of the study, (C) Food intake measured at 5, 9 and 13 weeks, (D) Whole body fat mass and (E) lean body mass measured by body composition analysis. White bars: placebo-fed mice; black bars: rapamycin-fed mice, n=7–10 per group, *p<0.05, **p<0.01 vs placebo.