BMI, or body mass index, is an outdated measurement that fails to properly identify health risks, according to a new study. Measuring body fat may be just as easy.

Body composition can tell you different facts about your health, but there are specific ways to measure it properly. Here, experts share what you need to know.

Study shows people with high body fat are 78% more likely to die and three times more likely to die from heart disease, calling into question BMI's reliability as a health measure.

Lean body mass and body fat are the two primary components of your body. Although the terms "muscle mass" and "lean body mass" are sometimes used interchangeably, they are not the same.