Parmesan is made from raw milk, rennet and salt. Animal rennet is the enzyme that comes from the fourth gastric mucosa of calves, goats or lambs.

cows for Parmesan are fed silage-free, i.e. without fermentation feed. The original Parmesan is called Parmigiano-Reggiano. It is protected by origin according to the DOP seal and may only be produced in the Italian provinces of Parma, Reggio Emilia, Modena, Bologna and Mantua.