Paul Mason, a 50-year-old man from England was once considered the world's fattest man at 980 lbs. but he recently underwent gastric bypass surgery and already is down to 560 lbs. He says his 20,000 calorie-a- day diet is what attributed to his extreme size, but he also blames Britain's national health service for not allowing him to see an eating disorder specialist when he was just over 400 lbs.
2. Donna Simpson
Donna Simpson (born 1967) is an American woman who, in 2008, expressed a desire to become one of the world's heaviest women. She wished to attain a target weight of 1,000 pounds (450 kg). As of June 2010, Simpson weighed 602 pounds (273 kg), down from her weight of 630 pounds (290 kg) in 2008. During the process, Simpson maintained a website where fans paid to watch her eat. In 2010, she won the Guinness World Records for the "Heaviest woman to give birth." In August 2011, Simpson decided to go on a diet to reduce her weight to a target of 370 pounds (170 kg) in order to become more self-sufficient and be able to do a better job of raising her children.
3. Manuel Uribe
Manuel Uribe (born June 11, 1965) is a man from Monterrey, Nuevo León, Mexico, notable for suffering from morbid obesity to one of the greatest extents known in recorded history. After reaching a peak weight of around 597 kg (1,320 lb) and having been unable to leave his bed since 2001, Uribe lost approximately 400 lbs. (one-third of his body weight, about 181.8 kg) with the help of doctors and nutritionists, and by following the Zone diet. Uribe drew worldwide attention when he appeared on the Televisa television network in January 2006, but turned down offers for gastric bypass surgery in Italy.
Uribe has also been featured on The World's Heaviest Man, a television documentary about his bedridden life and attempts to overcome the disease. By October 26, 2008, Uribe had reduced his weight to 360 kg (790 lb). His efforts to overcome the disease continue. In mid 2009, it was falsely reported that Manuel had died. As of February 2012, he weighs 440 lbs.
During his adult life, Hughes made guest appearances at carnivals and fairs; plans to appear on the Ed Sullivan television program were announced but never came about. On July 10, 1958, Hughes contracted a case of measles which soon developed into uremia, resulting in his death in Baylis, Illinois, U. S.; he was 32 years old.
He is often said to have been buried in a piano case. This error stems from a sentence that appeared in successive editions of the Guinness Book of World Records, which read, "He was buried in a coffin the size of a piano case." His headstone notes that he was the world's heaviest man at a confirmed 1,041 pounds (472 kg).
4. Robert Earl Hughes
Robert Earl Hughes (June 4, 1926 – July 10, 1958) was, during his lifetime, the heaviest human being recorded in the history of the world. Hughes' excessive weight was attributed to a malfunctioning pituitary gland. His chest was measured at 3.15 metres (10.3 ft), and he weighed an estimated 486 kilos (1,070 lb) at his heaviest. At the age of six, he weighed about 92 kilos (200 lb); at ten, he weighed 171 kilos (380 lb). By the time of his death, he weighed over half a ton.
5. Kenneth Brumley
Kenneth Brumley was one of the heaviest people ever recorded, whose weight was confirmed. He was featured on the Channel 4 BodyShock documentary "Half Ton Dad," as a father of four, who weighed almost 74 stone (468 kg or 1,035 pounds).
According to Kenneth Brumley's statements in the documentary, he had been bed-bound for four years. After he was accepted as a gastric bypass patient at the Renaissance Hospital in Houston, Texas, a fire crew had to hammer down a wall in Brumley's house to get him out. At Renaissance Hospital, Brumley was treated by the team of specialists that treated Renee Williams, believed to have been the world's heaviest woman at the time. The first step in Brumley's treatment was a diet restricted to 1200 calories per day, which enabled him to lose 167.5 pounds (76 kg) in only 40 days.