Prepackaged grated parmesan needs an anti-caking additive no matter where in the world you live. Cellulose isn't bad for you, in moderation. So the issue is not whether your prepackaged parmesan has cellulose added, it's how much was added.
If you don't like it then you should buy solid parmesan and grate it yourself. In the US or anywhere else.
If you don't like it then you should buy solid parmesan and grate it yourself. In the US or anywhere else.