Wikipedia has good basic information. They said:
Marketers of these products (company name deleted) make claims that açaí provides increased energy levels, improved sexual performance, improved digestion, detoxification, high fiber content, improved skin appearance, improved heartimproved sleep, and reduction of cholesterol levels. Quackwatch noted that "açai juice has only middling levels of antioxidants—less than that of Concord grape, blueberry, and black cherry juices, but more than cranberry, orange, and apple juices." Furthermore, the extent to which antioxidants According to the Washington, D.C. based Center for Science in the Public Interest (CSPI) thousands of consumers have had trouble stopping recurrent charges on their credit cards when they cancel free trials of açai-based products.  health, by themselves promote health is a matter of some debate. No credible evidence suggests antioxidants promote weight loss.
However....(giggle) I do take a tablespoon of acai juice everyday. Did I loose 15 pounds in the first week as claimed online? Noooooooo! Thank heavens for that! But I do think my digestion and lower intestinal track is working better than before. Really I don't want to talk about bodily functions at all....ever. So all I will say is this fruit juice is really tasty and if it has a positive effect on my plumbing then I am all for it! If it has even one of the other benefits mentioned then it is win win for me. I do not expect that to happen. Ordinarily I would discuss taking something like this with my physician so I will mention it to him when I go in for a physical. I am not diabetic nor do I have any other maladies that would be effected by fruit juice. I just wanted to let you know that it did not make me sick, cause diarrhea or turn me purple. All of those things are good in my world.
There are a lot of scams (see quackwatch) out there talking about rapid weight loss and feelings of exhilaration/high energy. Most are very costly. Some of those products are acai pills sold in conjunction with other supplements. I don't think that we should mess with our bodies in a way that would cause us to drop several pounds a day or even "cleanse" our system in the way that they suggest. I personally believe that too much can go wrong, especially when you are a senior citizen. You should avoid the wild claims made by online scam artists. Grocery stores with knowledgeable sales people that specialize in organic food and high quality supplements is a good source for this product and one I use frequently. Please note that you should not expect anything miraculous...sorry!!!!
I just thought you would want to know.
Have a great day!
Oprah.com (acai super food)
Secrets of the Blue Zone (Oprah.com)