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Series 4 Episode 2

Dieters attempt the most hyped and written-about diets on the market today - which diets work best?

Dr Xand van Tulleken and Dr Helen Lawal help road test diets including the charcoal diet, the breakfast diet, the MacDonald's diet, and the super food diet

Dr Xand van Tulleken and Dr Helen Lawal help ordinary Brits to road test some of the most popular diets out there.