Aimee is a 20-something city slicker whose diet consists of cereal for supper, cheese, alcohol and cigarettes. She thinks her high metabolism is what’s keeping her thin - she's in for a surprise when we push her body to the limit. Mike wouldn’t know what to do with a vegetable if it smacked him in the face. His idea of a perfect meal is a burrito - with at least four different types of hot sauce, not to mention the sour cream topping. Is Mike’s diet so bad it's actually changing his body chemistry?