Mason has told various British press that he ballooned to his enormous size by eating 20,000 calories a day. He claimed he developed an eating disorder in his 20s as an emotional response to a break up, his father's death and the deterioration in his mother's health.
At the height of his disorder, he would gorge on an entire package of bacon, four sausages and four eggs complete with bread and hash browns for breakfast. For lunch he would eat quadruple portions of fish and chips along with two kebabs, followed by a roast dinner, curries or pizza and more chips in the evening. During the day, he'd snack on 40 packages of chips plus sausage rolls and pasties.
As his weight grew, he was left unable to stand or walk. He was finally left bedridden. He quit his job as a postman when his weight prevented him from completing his deliveries. Eventually, a specially-adapted house was built and home aides were brought in to care for him. British taxpayers have footed the bill for everything, including his medical care, to the tune of $2.5 million.
In 2009, he underwent gastric bypass surgery to reduce the size of his stomach. Now that he's shed more than 600 pounds -- and his title as the world's fattest -- he says he hopes he can someday travel, meet a woman and live a normal, healthy life.
Mason said he is desperate to lose even more weight but believes it won't be possible without the additional surgery.
"I am doing my part in getting my weight down and they now need to do their part and remove the excess skin," he said. "It is stopping me from being able to get on with my life."