From my research, it sounds like it is very possible that acai berry based diets work. I would steer clear from anything that are acai pills, though. Those are the hype right now, but I would stick with pure acai, such as acai berries, juice, or puree. I've read that simply mixing acai puree into smoothies in the morning has been known slow down hunger and increase antioxidants tremendously. Without exercise, people have lost nearly 10 pounds within a month from just consuming acai on a regular basis.