In total, 24 real white truffles harvested in Italy have been analyzed, attaining a δ13C values between -42.6‰ and -33.9‰, with a most normal deviation lower than 0.7‰. Two commercial 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 outcomes from δ13C measurement have been evaluated as compared with these of real "white truffle" range and business synthetic bis(methylthio)methane commonpla...