Though it is not known exactly how long the Acai fruit has been harvested for human consumption, it is estimated that the natives of the Amazon rainforest have eaten this fruit as a main part of their daily diet for hundreds of years. There is a good reason that it forms such a crucial part of their daily diet, the berry is one of the 'super fruits' of the world that offers extremely high yields of vitamins and minerals in comparison to the size of the actual fruit.
Generally speaking the fruit has the appearance of a dark purple grape with an almost chocolate like bitter taste. The actual flesh part of the fruit is extremely small and each berry is mainly made up of the seed itself. The Acai is highly perishable and as such is rarely found in its fresh form outside of the Amazon jungle.
The main types of products you expect to buy Acai berries in will be supplements or juices. In supplement from you will often find tablets that can be taken every day or powders and puree that you can use to flavor smoothies or cereals. The juices themselves are quite widely available but often do not contain the desired amount of Acai extract to give you the correct amount of vitamins and minerals that you are looking for.

Some farms in the United States of America have now started to grow Acai berries so some stores now stock frozen fruits as fresh fruit is still hard to maintain for long periods of time. The stock you can get from American farms is not quite as good as the quality that is extracted straight from the Amazon but it is slowly getting better.
The extracts in pure form hold a very high yield of essential vitamins and minerals including omega 6 and omega 9 which are believed to help reduce cholesterol levels throughout the body. The detoxifying qualities of the Acai berry are second to none and they contain nutrients that fight off cancer causing free radicals.
You only need to look at the general health of the natives who eat the Acai berry as a main part of their diet to see the benefits of making this fruit part of your daily routine. It seems only logical that the idea is at least worth a try, you never know, you might just find it beneficial.

