Since when do diuretics have anything to do with bodyfat?
Diuretics have nothing to do with bodyfat, but when you're dehydrated and have low body fat, there's very little between the skin and muscle it gives a much dryer and ripped to the bone look. It's not uncommon for bodybuilders to use diuretics to dehydrate themselves to get that dried out look. Nasser and Jay both failed diuretics tests in competition at one point or another in their careers, not to mention who knows how many people got away with it. Jay got his decision overturned though...