For a while now, doctors have used Body Mass Index (BMI) to tell if someone is obese. BMI uses height and weight to estimate body fat. But new research suggests that BMI alone might seriously underestimate how many adults in the US are obese. If we consider body fat and overall health when defining obesity, the rate could jump from 40% to over 75% of US adults.

The number of obese people in the US could double.

I. What's key about this new definition and the research behind it:

The Lancet Diabetes & Endocrinology Commission wants to change how we define obesity by adding things like waist circumference and waist-to-hip ratio. Over 70 medical groups worldwide agree with this new idea, but it hasn't been put into practice yet. Researchers looked at data from over 14,000 people between 2017 and 2023. They found that if you combine BMI and waist circumference, 75.2% of adults would meet the criteria for obesity. Nearly 40% of those with a normal BMI actually had too much body fat, and obesity rates clearly went up with age.

II. Limits of the new definition and what's next:

The study points out that with this new definition, almost everyone over 50 would be considered obese. This means we need different standards for different age groups. Also, BMI by itself has its limits as a screening tool. Adding waist measurement makes it more accurate, but this new definition needs more research before it can be widely used.

III. Tips for dealing with obesity:

III. Tips for dealing with obesity:

If you find out you have an obesity problem, don't worry too much. Talk to your doctor first for a full check-up, including body fat and waist measurements. Eat less greasy and sugary foods, and more fruits, vegetables, and good quality protein. Exercise regularly, at least 150 minutes of moderate activity each week. Keep a good sleep schedule, avoid staying up late, and routinely track your weight and body fat changes. If needed, get professional help with weight loss.