Dr Michael explained on Radio 2 that with rapid weight loss plans, for example his own technique, the Fast 800, “you’ll lose more, but you’re likely to keep it off too.”

The secret is to make sure that in a calorie controlled diet such as this one, dieters aim for around 60g of protein per day.

“If you look at 800 calories, that’s basically a bag of crisps and a sandwich.”

Dr Jebb revealed that weight loss is “hard work”, and requires a great deal of “mental energy”, but the real challenge is transforming a quick-fix weight loss method into a “more sustainable eating plan”.

Source: Daily Express | Diet