My way of dealing with hunger is to remember that feeling hungry isn't too bad and it is possible to function quite well when you're hungry.”

When it comes to fasting, the NHS emphasise the importance of eating high-energy meals to prevent muscle wastage so as long as you’re getting a good balance of carbohydrate, protein, fat and fibre you will remain in good shape.

Of course, like most diets the ‘one meal a day’ plan does have its downsides - and Van Tulleken says it’s important to understand we do function less well when we’re hungry.

As such, he recommends only fasting on days that work for you and that depending on your job, personal health and activity levels, it might not be the right route for you.