The paper describes the various Blood Glucose measurement made non-invasively using the concept of Near-Infrared (NIR) Spectroscopy. NIR has been the recent trend of measurement as far as non-invasive technique is preferred. The various non-invasive glucose measurement techniques are discussed in which NIR plays a vital role.

Keywords : Terms: NIR Spectroscopy, Noninvasive, Plethysmograph, Regression Equations.