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The Best Seasons of Why Do I Put on Weight?

Every season of Why Do I Put on Weight? ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Why Do I Put on Weight?!

The Best Seasons of Why Do I Put on Weight?

Geneticist Giles Yeo and his team assess five overweight volunteers, before putting them on personalised diets tailored to their bodies and brains.