Body composition describes what the body is made up of, that is, the components of body weight. In the simplest model the body can be divided into fat and fat free mass. The amount of fat mass and fat free mass is indicative of current health status as well as being predictive of long-term health conditions, such as non-communicable diseases.
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Nuclear techniques to assess body composition include deuterium dilution, dual-energy X ray absorptiometry (DXA), total body potassium counting (TBK) and CT scanning.
These techniques can be used to inform nutrition programming, evaluate the impact of interventions, validate simple field techniques, and understand factors that influence short- and long-term nutrition related health.