Optical screening of diabetes mellitus using non-invasive Fourier-transform infrared spectroscopy technique for human lip

► In vivo technique has been developed to measure human lip non-invasively by FTIR. ► HbA1c levels of diabetes patients are able to be predicted by FTIR-ATR technique. ► Some of advanced glycation end products (AGEs) may be measured by FTIR. ► Measurement of lipid peroxides on lip is helpful for screening of the disease.