Why Are Thin People Not Fat?

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The world is affected by an obesity epidemic, but why is it that not everyone is succumbing?

Medical science has been obsessed with this subject and is coming up with some unexpected answers. As it turns out, it is not all about exercise and diet.

At the center of this programme is a controversial overeating experiment that aims to identify exactly what it is about some people that makes it hard for them to bulk up.

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