The star previously appeared on weight loss programme Sugar Free Farm, but revealed the experience put him off I’m A Celebrity… Get Me Out of Here!
He turned down the show in 2016 due to the lack of food campmates famously get to eat.
He said: “I’ve been asked to do the jungle but the base calorie intake is about 700. Look at me! If I survived a week I’d drop three stone and cannibalism would be on the cards.
“On Sugar Free Farm the weight fell off me because I couldn’t eat enough. Does ‘The Chase’ need me big? Put it this way, whenever I start losing weight because I’m doing a fitness kick of whatever, the producers go past me and hand me a second portion of pudding.”