Rosie O'Donnell is slamming Jay Leno over his past behavior toward a contestant on "The Biggest Loser." On Tuesday, the 63-year-old comedian and actress took to Instagram to vent her frustration after watching the new Netflix docuseries,

Jennifer Kerns, a physician in obesity medicine and a contestant of The Biggest Loser, reveals the inner workings of the show.

Learn how much 'The Biggest Loser' winners earned, including the $250K grand prize, at-home awards and other contestant payouts

Rachel Frederickson faced backlash from Biggest Loser fans for her extreme weight loss. But blame should be placed on the system that exploited her.

Suzanne Mendonca, a contestant from season 2 of the show, appeared on episode 3 of Fit for TV: The Reality of the Biggest Loser. She shared that casting directors asked her to gain more weight before coming to the show, and she listened to them. She quit her diet and started eating more food.

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,

Where are the winners of The Biggest Loser Australia now? Here’s what all of them look like and what they're up to today.

The Reality of the Biggest Loser," Danny Cahill shares his experience with the show. He shares how life is for him now.