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