Total Body Potassium

The determination of total body potassium based on a total body count of naturally occurring 40K can be used to estimate total-body cell mass or lean mass. With proper calibration, shielding of background radiation, and correction for body geometry, an accurate measurement of total body potassium can be obtained. However, the equipment is expensive and is available at only a few locations. In animal studies, this technique has been tested with live pigs,[6] lambs,[7] and cattle.[8]

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