What's the largest amount of weight lost by an individual through diet and exercise alone without medical invasion?

Arpeggionist

John Brower Minnoch, the heaviest man in history, was brought to the hospital once weighing 1,400 lb. On a 2,000 calory-per-day diet, he left the hospital some months later wieghing 350 lb. - a total of 1,050 lb. lost. He didn't manage to stay so slim, when he died only a few years laer he weighed 900 lb. Apr 29 05, 3:42 AM