2004: "The Biggest Loser" makes its TV debut, turning weight loss into a reality show.
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Why you may struggle to keep off lost weight
The Lead
Scientists following 16 "Biggest Loser" contestants say they know why many dieters can't keep off lost weight. Jake talks with the study's lead researcher.
4:46 • Source: CNN
Inspiring Weight Loss Stories 16 videos
2004: "The Biggest Loser" makes its TV debut, turning weight loss into a reality show.
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Why you may struggle to keep off lost weight
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A set of twins try out different diets and they get surprising results. CNN's Michaela Pereira has more.
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Twins' diet contest has shocking result
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