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