What is Parmigiano Reggiano made of?

Milk, salt, rennet and nothing else.
It seems incredible, but to make Parmigiano Reggiano you only need these 3 ingredients.
The Production Specification does not allow for anything else, which is why we proudly state that our Parmigiano is 100% natural, lactose-free and gluten-free, and above all, preservative-free.