PIPPA MIDDLETON: The weird food she's eating to prepare for her wedding

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A Two-Phase Diet

The Sirtfood diet has two phases, the first of which 'The Cut' can become dangerous. Lasting for three days, the Cut limits calorie intake to 1,000 per day, and consists of three Sirtfood green juices and one "normal" Sirtfood-rich meal. 

During the second phase of the diet (days four through to seven), calorie intake is increased to 1,500, and dieters are allowed an additional daily meal.