The Mighty Boosh star revealed that he has tried his best to avoid sugar to help his acting career.
Noel, 44, kept a zero-sugar diet for his role as Alice Cooper in an upcoming Sky Arts biography series, Urban Myths.
He admitted: “I get more work when I’m thinner, so I can’t put on weight.
“No one likes a tubby gut is what I’m saying. I don’t eat anything, I’m like a plant.
“It’s not that I don’t like cake – I have a very sweet tooth. But I was playing Alice Cooper and I had to lose a stone, so I wasn’t eating sugar.
“You can’t just get straight back onto sugar, as it’s quite a powerful thing,” the presenter told The Sunday Times.
This follows the first look trailer for Great British Bake Off which was released earlier this week.
Fans of the baking show, which has just moved over to Channel 4 from the BBC, were left “disturbed” by the footage which sees animated cakes dancing singing along to Paul McCartney and the Frog Chorus’s We All Stand Together.
None of the judges nor hosts, new or old, can be seen in the trailer, which has been slammed for its “creepy” aesthetic.