Health experts say meals should not exceed 600 calories, but in this study they ... only one in 10 meals was classed as healthy or fewer than 600kcal, as recommended by Public Health England.
The intermittent or 5:2 diet involves having two ‘restricted’ days per week, on which you must limit your calorie intake to 600–800 kcal ... you should only eat healthy foods.
Public Health experts have introduced a 400-600-600 weight loss ... around a quarter of adults' calorie intake comes from eating out, like grabbing a supermarket meal deal for lunch.