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 lower than 0.7‰. Two commercial intact truffles and 14 industrial samples of pasta, sauce, olive oil, cream, honey, and contemporary cheese flavored with truffle aroma had been analyzed, and the results from δ13C measurement had been evaluated compared with these of real "white truffle" vary and business artificial bis(methylthio)methane s...