7-Day Staircase by Dukan, is for ones who want to lose about 4 Kg in a week. The idea is to start woth pure protein and each day add new ingredient: vegetables, fruit, bread, cheese, starchy food and for the last day you treat yourself with a celebration meal (main course + dessert + glass of wine). 2 Litres of water is mandatory, and 20 minutes of walking will help you lose weight faster.