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 ...

At your last physical, your doctor may have recorded your body mass index (BMI). That statistic has long been thought of as an indicator of how healthy someone is. While it's still helpful, the truth ...