What BMI is good for
BMI gives a quick estimate of weight relative to height. It is useful for broad screening and population health, but it is not a diagnosis.
Where BMI falls short
Muscle mass, age, body composition, and individual medical context can change how a BMI result should be interpreted.
What matters beyond the scale
Movement, strength, sleep, blood pressure, nutrition, energy, and laboratory results can all provide important health information beyond body weight alone.