Every thing you read about nutrition and fitness these days tells you that a high level of antioxidants in your diet is the key to good health.  One of the best sources is the acai berry.  You can fight fatigue, stave off diseases, and lose weight just by supplementing your diet with the berry, juice, or supplements.  Side effects with acai are non-existent. 

There are no more side effects of adding it to your diet than there would be in adding any other fruit or vegetable.  That is, unless you consider not being as hungry or losing weight a side effect!   If you want a supplement that really works, acai is the way to go.

To read more about acai berry, check these links that I managed to find:

acai berry juice
acai berry scams
Acai Berries are Deep Purple