People come here underweight/ideal weight and then balloon out within months. All that calorie rich food plus minimum physical activity sure takes it toll. Best bet is to learn to resist temptation,no matter how cheap and yum, and stick to a healthy diet(might cost more too) with a few indulgences here and there. Personally as compared to in SL I do find more lower calorie/fat options here, which to me was a big boon!