Body composition refers to the proportion of fat, muscle, bone, and other components in an individual's body. It is a measure of how much of a person’s weight comes from fat tissue versus lean tissue (muscles, organs, and bones). Body composition can be used as a tool for assessing overall health and fitness levels, as well as for tracking changes in physical appearance over time. There are several methods to measure body composition, including skinfold measurements, hydrostatic weighing, bioelectrical impedance analysis, and dual-energy X-ray absorptiometry (DEXA). Understanding one's body composition can help individuals make informed decisions about their diet, exercise routine, and overall health.