Doctors are proposing a “radical overhaul” of how obesity is diagnosed worldwide amid concerns that a reliance on body mass index may be causing millions of people to be misdiagnosed. More than 1 billion people are thought to be living with the condition that for decades has been diagnosed by measuring a person’s BMI (their ratio of height to weight) to estimate the amount of excess body fat they have. However, there are fears BMI on its own is not a “reliable measure” of an individual’s health and may be resulting in both under- and over-diagnosis of obesity, with “negative