There are several diet plans that use the high protein element as a factor in helping people lose weight: The Zone Diet, Atkins Diet, and South Beach Diet are just a few of the commercial high protein diets available. Why do high protein diets work well enough that many famous people, including Jennifer Anniston, claim that they are the best diet plan to follow? Filling up on proteins help your body stay full longer, making you less likely to snack throughout the day. Eliminating empty carbohydrates like white sugar can also help keep your sweet tooth from craving junk food.