In whole, 24 real white truffles harvested in Italy were analyzed, attaining a δ13C values between -42.6‰ and -33.9‰, with a maximum normal deviation decrease than 0.7‰. Two business intact truffles and 14 industrial samples of pasta, sauce, olive oil, cream, honey, and fresh cheese flavored with truffle aroma were analyzed, and the results from δ13C measurement were evaluated in comparison with those of real "white truffle" range and commercial artificial bis(methylthio)methane normal. Sub oli...