English: THz spectroscopy has recently emerged as a novel technology with several advantages with respect to other spectroscopic techniques, such as real–time data acquisition and non–destructive, non–invasive detection of signatures in medical and food substances. These features have been proven through the use of a THz spectrometer with proper data processing. Several commercially available compounds used in the pharmaceutical and nutritional sector have been analyzed with this technology and have been found to be consistent with the available literature.