In total, 24 genuine white truffles harvested in Italy had been analyzed, attaining a δ13C values between -42.6‰ and -33.9‰, with a maximum customary deviation decrease than 0.7‰. Two industrial intact truffles and 14 industrial samples of pasta, sauce, olive oil, cream, honey, and fresh cheese flavored with truffle aroma had been analyzed, and the results from δ13C measurement were evaluated compared with these of real "white truffle" range and commercial artificial bis(methylthio)methane norm...