Oprah, Dr. Oz sue to set record straight

So last year when she and Doctor Mehmet Oz talked about the /*acai berry*/ on her show, the number of acai products exploded. They were advertised on television, the internet and in emails. Acai berries were marketed as the answer to weight loss, sexual dysfunction, even the secret behind living a long life. And these companies used Oprah's name and Dr. Oz's too.

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"Companies used the fact that /*Oprah*/ and Memhet Oz talked about the acai berries on their shows to create the impression that Oprah and Oz were selling these products. And endorsing them," said David Schardt, Center for Science in the Public Interest.

Not only were they not endorsing the products, but The Center for Science in the Public Interest says there is no evidence acai actually helps you lose weight.

Now, Oprah and Dr. Oz are suing more than 40 companies. /*Dr. Oz*/ talked exclusively to ABC's /*Diane Sawyer*/ about the suit.

"It's been very hurtful, because many Americans have seen images of me, and Oprah, and others supporting, it would appear, products that actually don't work in the ways that are described." said Dr. Oz. "If you see my picture next to something that is being sold, that is a supplement I did not endorse it, because I have no relationships at all with any of these companies."

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