The Biggest Loser became a cultural phenomenon when it premiered in 2004 — but the show has been plagued with scandals and controversy

The Biggest Loser' is the subject of the 2025 Netflix docuseries 'Fit for TV: The Reality of the Biggest Loser'

Former Biggest Loser celebrity trainer Jillian Michaels took to social media to break her silence on the Netflix docu-series, Fit for TV: The Reality of the Biggest Loser.

Tracey Yukich collapsed during the first challenge on "The Biggest Loser" Season 8, later claiming she died before being transported from a beach to a hospital.

"The temptation challenges were the hardest part of the show for me," Sweeney says in Netflix's docuseries, 'Fit for TV: The Reality of The Biggest Loser'

That prompted the Los Angeles County Sheriff's Department to take action. A reality show about treadmills and salads had unexpectedly evolved into a police probe. After Season 17 of The Biggest Loser, NBC decided to cancel the show due to widespread criticism and legal issues.