In a new study, neither weight nor body mass index (BMI) changed noticeably six months after children switched to low- or reduced-fat dairy products. Instead of trimming their waistlines, kids who slashed fat intake appeared to compensate by eating more calories from other sources, according to the new findings. The same happens with adults. Our bodies require a certain amount of fat to function normally and fat helps slow down digestion and increase feelings of satiety.
Source: American Journal of Clinical Nutrition, March 23, 2011