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research is ongoing
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Bioelectrical impedance analysis (BIA) measures the opposition of body cells
and tissues to the flow of a radiofrequency alternating electric current.
The voltage drop between electrodes provides a measure of impedance, which
is low in lean tissue and high in fat tissue and bones. Impedance is the
vector sum of the resistance or conductive characteristics of body tissues
and the reactance or opposition due to the capacitance of cell
membranes, tissue interfaces, and non-ionic substances.
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