A large apple, for example, is around 100 calories, and about three and a half squares of milk chocolate.

Brightly coloured peppers with a dollop of hummus might also be a good low-calorie option for 500 calorie only days.

Sumaya believes that the benefits of intermittent fasting exceed weight loss: “The first week or two was more of a mental challenge but now I look forward to it.

“I look forward to how it feels. Put it this way, sometimes when you eat you feel lethargic, you feel full, you feel tired – now imagine the opposite feeling, where you wake up and feel energised and focussed.”

So how safe is this weight loss method? The type of intermittent fasting Sumaya did was “ridiculously hard”, according to nutritionist Joy Bauer.

Source: Daily Express | Diet