WASHINGTON (AP) — Under pressure from Congress, celebrity doctor Mehmet Oz on Tuesday offered to help “drain the swamp” of unscrupulous marketers using his name to peddle so-called miracle pills and cure-alls to millions of Americans desperate to lose weight.

Oz appeared before the Senate’s consumer protection panel and was scolded by Chairman Claire McCaskill, D-Mo., for claims he made about weight-loss aids on his TV show, “The Dr. Oz Show.”