Just because Kate Middleton may be on it, doesn’t mean it’s a healthy diet. I give the Dukan diet two thumbs down in this month’s Chatelaine! And I’m not alone. France’s governmental National Agency for Food, Environmental and Work Health Safety has identified it as one of 15 imbalanced and potentially risky diets. The British Dietetic Association, the country’s organization of professional dietitians, branded it one of the five worst diets of 2011.