The show centers on overweight and obese contestants attempting to lose the most weight; the winner receives a cash prize.
There is no minimum or maximum weight limit for the show, but most males tend to weigh over or near 300 lb (136 kg).
In addition to individual contestants, some seasons in some international adaptations have featured couples or even whole families.
Jodie Prenger from series 2 of the British version was the first female biggest loser worldwide, losing 46.85% of her original body weight.
The Biggest Loser: Ultimate Workout is a video game for Xbox 360 which uses its Kinect camera.