Dr. Mehmet Oz today responded to questions over his credibility, telling Elisabeth Hasselbeck that he wishes he hadn’t used “laudatory terms” for weight loss supplements.

Oz has faced criticism for hawking weight loss products. Six of his fellow Columbia faculty members recently told USA today:

“Many of us are spending a significant amount of our clinical time debunking Ozisms regarding metabolism game changers. Irrespective of the underlying motives, this unsubstantiated medicine sullies the reputation of Columbia University and undermines the trust that is essential to physician-patient relationships.”

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Oz acknowledged that he does toggle back and forth between “hardcore medicine” and “unsubstantiated” alternative medicine.

“I wish I had never used the laudatory terms I used for weight loss supplements. That was the big mistake I think all of us acknowledged, and I stopped doing that a long time ago, over a year ago,” he said.

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But he added, “In general, I get it right.”

Oz also discussed his one-thousandth episode and the news that he's expecting a second grandchild. Watch the full interview above.