Season 15 winner Rachel Frederickson lost nearly 60% of her body weight, shocking viewers and health experts at the time. Fit for TV: The Reality of The Biggest Loser, a documentary about the show's complicated legacy,

Netflix’s new documentary, “Fit for TV: The Reality of the Biggest Loser” just landed on the streamer and it pulls back the curtain on allegations made against producers and former cast members of NBC’s former series “The Biggest Loser.”

Robert Huizenga spoke about his experience on 'The Biggest Loser' on the Netflix docuseries 'Fit for TV: The Reality of The Biggest Loser'

The Reality of the Biggest Loser alum, Rachel Frederickson, lost a remarkable 59% of her body weight, from 260 to 105 pounds, winning the series in 2014.

David Broome, a co-creator of The Biggest Loser, says in the docuseries that he got the idea for the show after seeing a desperate “help wanted” ad for a personal trainer to “save my life” on a bulletin board outside of a gym. Once the show was underway, producers searched for similarly desperate contestants.

From tension between Bob Harper and Jillian Michaels to one contestant nearly dying on the set, the new series was full of secrets.

Rosie O’Donnell has strong feelings about Netflix’s “Biggest Loser” docuseries. After watching “Fit for TV: The Reality of the Biggest Loser,” O’Donnell publicly called out Jay Leno for how he treated former contestant Tracey Yukich in the doc.

The Reality of The Biggest Loser, is shining a bright light on the old weight-loss show, and it’s not looking pretty.