The National Institute for Health and Care Excellence guidance in the UK says the Asian and other ethnic groups must be extra careful about their weight because they are prone to diseases like diabetes, reports BBC.

BMI is a way of seeing if your weight is appropriate for your height. It is calculated by taking your weight (in kilograms) and dividing it by your height (in metres) squared to give you a BMI score.

It means a 5ft Ilin (1.8m) Asian man should weigh below list 111b (75kg) and an Asian woman who is 5ft 3in (1.6m) should weigh less than 9st 41b (59kg).