Decent site! Very bright, and I imagine it'll do what you're intending with it. Might want to check some of you're images though, while they load fast they're still pretty huge files. Optimize them a bit maybe?
Header part is good, but i think you need to work on footer area, looks quite empty, and your home page is very long, so it takes little more time to open, put only 2-3 reviews in this section Acai Slim Reviews and make another page of Review section and take people there through link, that will make your home page little shorter.
Nice informative site but the template and color schemes are not much impressive and specially the header is bad not suited for the entire theme.
You are making false medical claims in the review section. Masking them as reviews does not change this. I see that you are in Canada, and I don't know what the law is there on this. In the US, the FDA has issues with marketing such as this. So that's probably something to look into.
I agree with DubDubDubDot, you must be very careful now about making any medical claims. You have a page on the benefits of acai berries which isn't really a review. I think the new FDA rules start in December but I may be wrong. A nice site, I would either shorten the testamonials or put on another page.