The Biggest Loser is a reality television show which started in the U.S. in 2004. The show centers on overweight contestants attempting to lose the most weight and to fight for a cash prize. There are different variations of The Biggest Loser around the world. Each country has made its own adaptation to the show; however, the contestants always have the same goal: to lose the highest percentage of weight (or most weight) to become the Biggest Loser.
A similar programme, Operation: Transformation, airs on Irish television on RTE One, however it does not have a competitive format.