3. Weight Watchers
Weight Watchers CEO on fighting obesity
Score: 3.9 out of 5
One of the biggest brand name diets out there, the Weight Watchers point system has been lauded and used by many dieters everywhere.
The balanced approach allows people to eat whatever they want and gives people the option to choose what they want to eat -- as long as it fits within their daily allotment of points. An online calculator, book and app help dieters tally the points. Exercise can also earn them extra points.
Points take into a account protein, carbohydrate, fat, fiber, calories, and how hard your body has to work to burn it off, making a 200-calorie fruit smoothie cost more than a 200-calorie iced coffee according to U.S. News. You can also purchase pre-packaged food if you are willing to dish out the dough for it.
While proven to be successful for those who stick to it, it requires a membership -- with the option of helpful in-person meetings -- which can be costly.