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Controversial 'Fast Diet' Instructs 2 Days of Fasting

British doctor who created the feast and famine weight loss plan says it can help you live longer.
06:58 | 03/01/2013

Transcript for Controversial 'Fast Diet' Instructs 2 Days of Fasting

It is the hottest new trend in modern day weight loss with principles as old as humanity itself as long before hunting and gathering involved drive through windows. Our ancient ancestors -- as much as... See More
This transcript has been automatically generated and may not be 100% accurate.
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