I have had good success on this kind of diet. When I was younger I lost a significant percentage of my body weight on the Carbohydrate Addicts Lifespan Program, and kept if off for five years. Now I am working the Protein Power Phase I plan. They work well if you are hypersensitive to the insulin produced by carbs. There is a quiz here - The Carbohydrate Addict's Official Quick Quiz
- to see whether you are one of these people. (If you answer "yes" to most of the questions, and think "of course, doesn't everyone?" find a naturally slender friend and ask them to take it and compare answers. You might be surprised.) If you aren't sensitive to carbs, this kind of diet probably isn't the right one for you. There are different forms of the basic concept, and some are healthier than others. The best don't describe themselves as "high fat," but encourage you to eat low-glycemic vegetables, and lean protein. You still end up with a high percentage of your calories from fat, because once you reduce carbs and make sure to get enough protein, fat is where most of your calories are, but you also get nutrition and fiber. Good luck!