Acai berry diet is it a scam or does it really work,need help finding out?

It is an over-hyped expensive scam.
Best advice, don’t buy acai stuff anywhere.
In truth, açai juice has only middling levels of antioxidants—less than that of Concord grape, blueberry, and black cherry juices.
Oprah Winfrey, Mehmet Oz, and Rachael Ray have all publicly disassociated themselves from the açai sites that make unauthorized use their names.

There are no magical berries from the Brazilian rainforest that cure obesity. Claims are unproven, evidence is anecdotal, antioxidants are beneficial, but do not aid weight loss.

"These diet ‘bloggers’ are just a mirage," Schardt said. "Their weight loss is courtesy of Photoshop, not açai."

Well, it is a very healthy food.

But if you’re looking for some sort of "miracle" food, that it is not.