The Biggest Loser
Jillian Michaels Doesn't Agree with the Study That Found The Biggest Loser Alters Contestants' Metabolism

Credit: Justin Lloyd/Getty

Jillian Michaels doesn't mince words about the new study that says former Biggest Loser contestants have damaged their metabolism from extreme dieting on the show.

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Biggest Loser Winner Ali Vincent Says New Study Likely Explains Her Weight Gain: 'I Too Probably Have a Slower Metabolism'

Credit: Courtesy Ali Vincent

Ali Vincent triumphantly won the fifth season of The Biggest Loser, dropping 112 lbs. In April, she made a tough announcement and publicly shared on Facebook that she regained almost all of her weight. But Vincent is determined to drop it for good, and joined Weight Watchers. She'll be blogging about her progress on People.com.

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The Biggest Loser Contestants Often Regain the Weight Because Their Metabolism Never Recovers, According to New Study

Credit: Chris Haston/NBC

While contestants on The Biggest Loser drop an incredible amount of weight in just a few short weeks, that weight loss is often unsustainable and actually harmful to their metabolism, according to a new study.

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Former Biggest Loser Winner Regained Almost All the Weight Back as She Struggles with Fertility Treatments

Credit: Trae Patton/NBC/Getty

After losing 112 lbs. to win her season of The Biggest Loser eight years ago, Ali Vincent made a tough announcement, telling her fans on Facebook that she's regained almost all of her weight, putting her back over 200 lbs.

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Why a Biggest Loser Finalist Gave Up the Chance to Win $250,000

Credit: Chris Haston/NBC

"You can't buy thin."

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Jen Widerstrom's The Biggest Loser Blog: 'Go Step into Your Greatness. It's Waiting for You'

Credit: NBC

Jen Widerstrom is a trainer on NBC's The Biggest Loser. In her first season on the show, Jen successfully coached Toma Dobrosavljevic to the winner's podium. As she works to maintain her perfect winning average in season 17, her second season on the show, Jen will blog each week about the latest episode. Follow her on Twitter: @JenWiderstrom. The Biggest Loser is on NBC at 9 p.m. ET.

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Jen Widerstrom's The Biggest Loser Blog: It's Makeover Week with Tim Gunn, 'I Couldn't Care Less About the Weight Loss'

Credit: NBC

Jen Widerstrom is a trainer on NBC's The Biggest Loser. In her first season on the show, Jen successfully coached Toma Dobrosavljevic to the winner's podium. As she works to maintain her perfect winning average in season 17, her second season on the show, Jen will blog each week about the latest episode. Follow her on Twitter: @JenWiderstrom.. The Biggest Loser is on NBC at 9 p.m. ET.

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See The Biggest Loser Contestant Felicia Buffkin's 'Sexy' Makeover After Losing 50 Lbs.

Credit: Chris Haston/NBC; Trae Patton/NBC

Felicia Buffkin spent the first half of her time on The Biggest Loser working out and shedding weight, but the results didn't really sink in until Makeover Week.

"It's allowed me to appreciate the hard work I've put in carving this new body of mine," the 29-year-old says in the current issue of PEOPLE. "I was so emotional when I saw myself in the mirror for the first time."

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Jen Widerstrom's The Biggest Loser Blog: Do Not Assume Failure

Credit: NBC

Jen Widerstrom is a trainer on NBC's The Biggest Loser. In her first season on the show, Jen successfully coached Toma Dobrosavljevic to the winner's podium. As she works to maintain her perfect winning average in season 17, her second season on the show, Jen will blog each week about the latest episode. Follow her on Twitter: @JenWiderstrom.. The Biggest Loser is on NBC at 9 p.m. ET.

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