Dukan Diet help you put an end to the inevitability of weight problems

The Dukan Diet may sound like just another high-protein, low-fat diet that is all too familiar to Atkin's followers, but with 5 million French people having claimed they lost weight with it, 3.5 million books sold and 10 years of success, something must be different.

Perhaps it's celebrities like Jennifer Lopez and model Giselle Bundchen who have reportedly tried it and lost their post-pregnancy pounds. Or maybe it's Kate Middleton's mom, Carol Middleton, who has lost weight because of it (with rumors that the princess bride-to-be is also trying it).

The diet's creator, Dr. Pierre Dukan, said there is no counting calories and no weighing food with his plan. Instead, the diet is organized into four distinct phases, each one with certain foods that must be consumed and avoided.

The consolidation phase includes unlimited protein and vegetables again but also adds in two slices of bread, one serving of cheese, one serving of fruit and two servings of carbohydrates a day. Interestingly enough, it also allows for two weekly "celebration" meals with wine and dessert (leave it to the French to come up with this!).

The stabilization phase is the final period and consists of six days a week of "anything goes" and one day of a strict protein-only diet (Dukan suggests Thursdays) for the rest of your life.

Follow this plan and walk for 20 minutes a day, and Dukan promises you will never regain the weight. Sounds too good to be true? It could be, at least according to one expert.

"Because the diet is based on deprivation and the elimination of certain food groups, it is not the healthiest way to lose weight long term," said Keri Glassman, nutritional expert and author of "The O2 Diet". "An effective weight loss diet should include a variety of foods. I don't think this one is healthy, and I think it may set people up for intense cravings and overeating."

While this diet may result in weight loss, especially at the beginning stages, dieters should know there are possible side effects like fatigue, constipation, bad breath and dry mouth. It's also not intended for anyone following a vegetarian diet. "If you have not been successful with maintaining (or felt good on) a very high-protein diet, I would not recommend it," added Glassman.

"My dear friends, today I am reaching out to you with the certainty that I can help you put an end to the inevitability of weight problems in North America," he wrote in the preface of his new edition. "Now let this mutual journey begin!"