It's been known about for years, and has been used for years by some.
The only advice I can give is get some that is freeze dried, and made up of mainly pure ACAI, ie not with certain other bits added esp caffeine is a fave thing to add, there will be other bits but this can't be avoided as the capsule is made of somethin to start with.
The cheapest best most convenient place I found is Holland & Barret, I use,
ACAI 1500mg, has triple strength on a yellow banner on top edge of label, is a green bottle, showing what looks like blackberries on the front, 120 tablets in these.
I also take ACAI superfruitjuice, again from same shop but made by Ransom, a red colour bottle, it is made up from Red Grape, Lycopene, Resveratrol.
Acai and the other things listed are anti oxidants, they get rid of all the poisenous things entering the body, or try to anyway, they must have amazing fat burning properties as the blind test done with 500 people, no one knew which they were on, all were picked at random, but after 2 years the people on acai showed a 98% success rate ranging from mild to amazing improvement, the people were all ages(16+) all types of health.
I tried it on recommendation from a friend, who like myself used to take blue dianabol(anabolic steroid), did wonders for him.
I think the worse you are health wise the more you will potentially gain, as have more that can be gained.
The acai superfruitjuice cost £7.95 a bottle which lasts for 3 weeks, on it's own don't know how succesful as I take the tablets as well.
My sas dr tells me there was a big feature on it a few months back in some mdeical journal, and he's giving it a try, as he's not that healthy now, but had a hard life!!
tabetha