In whole, 24 real white truffles harvested in Italy were 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 business samples of pasta, sauce, olive oil, cream, honey, and fresh cheese flavored with truffle aroma have been analyzed, and the outcomes from δ13C measurement have been evaluated in comparison with those of genuine "white truffle" vary and commercial synthetic bis(methylthio)methane commonpla...