Parmesan has close to zero lactose. However, it has an extremely high level of free glutamate, up to 1.6%, which is why it tastes delicious and makes other food taste delicious. Probably should avoid it, along with MSG, if you have blood pressure issues. Probably fine otherwise.
I do drink a lot of milk so I do know I'm not lactose intolerant so my prior assumption was that cheese wouldn't bother me either. I didn't know that hard cheese had so little lactose and I'm happy to be corrected. The parmesan cheese was thankfully just a transition phase that I was able to stop.
