Alison Sweeney hosted The Biggest Loser for eight years before leaving the long-running weight loss game show after its 16th season in 2015.

Each season of The Biggest Loser found contestants undergoing a 30-week boot camp led by a series of trainers — the most notable being Bob Harper and Jillian Michaels. Contestants were given workout and nutrition plans, and whoever lost the most weight by the end of the training period was awarded $250,000.

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

Sweeney, who made a name for herself as an actor in the well-known daytime series, Days of Our Lives, decided to return to acting as she left 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 Reality of the Biggest Loser, a docu-series chronicling the infamous weight loss show, The Biggest Loser, bringing back the conversation of why Alison Sweeney chose to leave the series. Sweeney appeared in the documentary as well and addressed that she did not leave the show due to the

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.

"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'

Alison Sweeney began hosting The Biggest Loser in Season 4, taking over for Caroline Rhea. “As host of the show, it was my job to be there for the contestants and encourage them to talk about some of the harder things that are embarrassing and hard to talk about,” Sweeney said in the documentary.