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2004: "The Biggest Loser" makes its TV debut, turning weight loss into a reality show.
2004: "The Biggest Loser" makes its TV debut, turning weight loss into a reality show.

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    Here's why you may struggle to keep off lost weight

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Here's why you may struggle to keep off lost weight

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.

Here's why you may struggle to keep off lost weight

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.