Whenever two people meet together and discuss body mass index, there is a disagreement of what the correct number should be. The table below lists the commonly accepted values for western people:
| < 18.5 | Underweight |
| 18.5 - 25 | Normal |
| 25-30 | Overweight |
| Above 30 | Obese |
| Above 35 | Severely Obese |
| Above 40 | Morbidly Obese |
| Above 50 | Super Obese |
Although BMI is broadly accepted as a shorthand indicator for general health, it is also criticised for giving an often inaccurate view of weight and for over-emphasizing weight over other health factors. Indeed the focus on unhealthy diets above being healthy is an obvious manifestation of this trend.
Nothwithstanding these criticisms, people with high BMIs are unquestionably risking their health and statistics clearly show a correlation between obesity and poor health.
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