The skin impedance model representing a skin impedance response in a high frequency band is disclosed. Skin impedance model of the present invention can be obtained from the data of which is measured using a 3-electrode method of measurement target body part to be estimated by measuring the voltage between the flow to the measurement target body part ends the current to both ends of the body the measuring object . Skin impedance model is a second region having a third resistor the first resistor and the parallel connected first constant phase element (CPE) second constant phase element first region and a second resistance and connected in parallel with the serial connection and and a fourth resistor and a third area having a third constant phase element connected in parallel, and is configured to be the first region and the serial connection through the fifth resistance second region and the third region is a parallel connection. Thus, the present invention is by suggestions that skin impedance model is hundreds of kHz band from several MHz band to the bio-impedance of well represented by EIT (Elecrical Impedance Tomography) or Analyzers etc. Body Composition Measurement and drug penetration degree or skin acupuncture points of characterization, It can be applied to various fields such as clinical investigation of the skin reaction to the stimulus. ; Body composition analysis component, bio-impedance, skin impedance model, the high-frequency band, resistance, constant phase element (CPE), a complex impedance locus, complex admittance locus, EIT (Elecrical Impedance Tomography)
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