Dr. Mehmet Oz — host of "The Dr. Oz Show" — found himself on the defensive against a Senate subcommittee Tuesday, as lawmakers grilled him about weight loss products and deceptive advertising.

Oz was one of several people called to testify before the panel about false and misleading advertising for weight loss products, and the risks they pose to unwary consumers. Sen. Claire McCaskill, D-Mo., chair of the Consumer Protection, Product Safety, and Insurance subcommittee, slammed Oz for promoting a "magic weight loss cure" on his syndicated program.

"I don’t get why you need to say this stuff, because you know it’s not true," McCaskill said. "You are being made an example of today because of the power you have in this space. We didn’t call this hearing to beat up on you, but we did call this hearing to talk about a real crisis in consumer protection."

"I realize, to my colleagues at the FTC, that I have made their jobs more difficult," Oz told the panel. "I came here because I want to be part of the solution, not part of the problem."

Oz said he supports more private sector oversight of weight loss and dietary supplements, including a "bounty system" to help crack down on distorted ads.