I'd have to see some data to be convinced. There is nothing more problematic to health than aging. If we make all "fatties" thin we'll eventually get a bunch of geriatric cancer or dementia patients, or some other expensive age-related health problem (e.g. what is the lifetime healthcare cost-burden of obese people who live on average to 65 vs. thin people who live on average to 85 - just making up numbers here)