The Dukan Diet, also known as the princess diet, is a diet plan originating in France. It is a protein-based diet designed by French doctor Pierre Dukan. Although Dukan has been promoting his diet for over 30 years, it gained greater popularity after publication of his book in 2000. His book The Dukan Diet has sold more than 10 million copies globally. The book has since been translated into 14 languages and published in 32 countries. The Dukan Diet was released in the United Kingdom in May 2010, and in the United States in April 2011.
It is a multi-step diet based on high protein and limited carbohydrate consumption. It starts with two steps intended to facilitate short term weight loss, followed by two steps intended to consolidate these losses and return to a more balanced long-term diet.
The diet is based on a list of over 100 allowed foods, as well as four specific ground pillars also known as phases: attack, cruise, consolidation, and stabilization.
The attack phase is designed to enable dieters to rapidly lose 2 to 3 kilograms (4.4 to 6.6 lb) in 2–7 days by kick-starting their metabolism. Dieters are allowed to eat as much as they want of 72 protein-rich foods.
The cruise phase is designed to allow dieters to more gradually achieve the weight they aim for by eating protein-rich foods with the addition of 28 specific vegetables. The length of this phase is usually calculated as 1 kilogram (2.2 lb) of weight loss per week, but this is based on specific personal conditions. Tolerated foods are also allowed as per the programme, but any weight gain will ban some of these.
The consolidation phase is designed to help in preventing any future massive weight gain. During this phase, fruit, bread, cheese and starchy foods are reintroduced into a normal diet, leaving two celebratory meals a week as directed by the plan.
Finally, in the stabilization phase, dieters can essentially eat whatever they want without gaining weight by following a few rules: protein day once a week, eating oat bran every day and making a commitment to "take the stairs". According to Dukan, dieters shall follow this last phase for the rest of their life to avoid regaining weight. Ofcourse the glycemic index (on a scale from 1 to 100) of the kind of carbohydrate consumed is also of importance (see the GI diet).