In total, 24 genuine white truffles harvested in Italy have been analyzed, attaining a δ13C values between -42.6‰ and -33.9‰, with a most customary deviation decrease than 0.7‰. Two business intact truffles and 14 industrial samples of pasta, sauce, olive oil, cream, honey, and fresh cheese flavored with truffle aroma have been analyzed, and the results from δ13C measurement were evaluated in comparison with these of genuine "white truffle" vary and business synthetic bis(methylthio)methane nor...