Isotopic and elemental profiles of Mediterranean buffalo milk and cheese and authentication of Mozzarella di Bufala Campana PDO: An initial exploratory study

•Stable isotope ratio and elemental analysis characterise Mozzarella di Bufala Campana (MBC).•Differences were found between MBC and relative milk.•Geographical origin have effect on the elemental and isotopic fingerprint of MBC.•Stable isotope ratios and elements are effective to distinguish PDO and non-PDO mozzarella.