Medically reviewed by Suzanne Fisher, RD Key Takeaways Body mass index (BMI) is a calculation used to estimate your body fat.

Add Yahoo as a preferred source to see more of our stories on Google. For these reasons as well as the influence of environmental, hormonal, and mental factors, “your body size is not a very good ...

If your BMI reading has ever felt off — like it didn’t quite match how you look or feel — you’re not the only one questioning it. A string of studies published this year has doctors and researchers ...