This documentary is about a man from Texas named Kenny Saylors, who is morbidly obese man [= BMI of 40+], who is ~5'9" and 315-lb [271-lb would be a BMI of 40]. Kenny's body fat was 53%. His lean body mass was 147-lb.
Apparently he fasted for 40 days on just water [the title says 50 days, but within seven minutes of the documentary, he says he picked 40], under medical supervision, but there have been suggestions online that he faked it:
It's sad that so many people today think EVERYTHING can be done overnight, as is often the case, but is really not the case with weight loss, since it's more about long-term lifestyle changes/practices, than it is about going on a diet.
I thought the documentary was new, and has a release date of 2009 on IMDB...but in one part he calls President Clinton's office, which leads me to believe that it was filmed in 2000.
From the looks of recent pictures of Kenny [the first one below is from 2017, and the next one is more recent] it appears that after filming was complete, he went back to his old habits.
It's no wonder he wasn't able to sustain his weight loss progress, from such an extreme and unsustainable program.
I would love to read Henda's opinion on this.