Professor Edzard Ernst, who is a leading alternative medicine researcher of Britian, has called the Prince of Wales a “snake oil salesman”. The comments of the professor came after the Prince showed his support to the homeopathic remedies and promoted the Duchy Herbals detox tincture. Ernst has claimed that the Prince is supporting these products without any scientific basis.

In a brief discussion with reporters at the Science Media Centre in London, the professor named the Prince as “named the prince as "one of the most outspoken proponents of homeopathy”.

Edzard Erns is stepping down from his post as Britain's only professor of complementary medicine at Exeter University. He said, “Almost directly, Prince Charles has managed to interfere in my professional life and almost managed to close my unit”.

In response to the claims of Ernst, a spokeswoman for Prince Charles told the Reuters that the royal heir was not involved in the dispute with Ernst. She did not make any comments on professor's comments about snake-oil salesmen.

After the comments were revealed, the Ernst's complementary medicine research unit at Exeter's Peninsula School of Medicine had been threatened of complete closure.