Truth Diet is the first two phases... The third phase you need to leave out Dairy... Fourth phase does not worth. You have to mostly stick to Stage 1 and 2... serious when I say no Dairy! You can suck it up and get use to it!
This is a detailed review of the Dukan Diet. It is a high-protein, low-carb diet that is claimed to cause fast weight loss without hunger. Learn more here: https://authoritynutrition.com/dukan-diet-101/