In total, 24 genuine white truffles harvested in Italy were analyzed, attaining a δ13C values between -42.6‰ and -33.9‰, with a most normal deviation decrease than 0.7‰. Two commercial intact truffles and 14 business samples of pasta, sauce, olive oil, cream, honey, and recent cheese flavored with truffle aroma were analyzed, and the results from δ13C measurement were evaluated compared with these of real "white truffle" vary and industrial synthetic bis(methylthio)methane commonplace. Sub oliv...