Jamie Oliver has compared energy drinks to cocaine.
The celebrity chef and healthy food campaigner said that it can be difficult to teach children who have been drinking the non-age-restricted substances.
Oliver told the Evening Standard that parents giving their children such drinks "might as well be giving them cocaine".
When it was suggested that was 'a bit strong', Oliver replied: "Try teaching them after they've necked a can of it."
Oliver admitted that he has to be careful not to be seen as a "right proper w**ker" when talking about health issues, but added: "Hand on heart, I believe I work for the public, and that carries massive, genuine responsibilities."
Of his controversial 2010 US show Jamie's Food Revolution, Oliver said: "We had to cut it. It was so embarrassing, it would have seemed patronising.
"They thought honey came from bears and spaghetti grew on trees and chocolate was from lakes."