Not dairy in general. I can eat it with no problem. In fact, most cheese is no problem. There is only one problem cheese, and it happens to be very tasty. If I stick it under the broiler on toast (and it melts thoroughly) or put it in mac and cheese, it presents no problem. If I eat it on a cracker or by itself, my lips start itching. I figure it's some mold specific to that cheese or something in the milk related to whatever they're feeding the cows that gets destroyed in cooking. I have similar issues with peanuts, almonds, carrots, under-ripe cherries and celery--it's apparently related to the fact that I have bad seasonal allergies. But cheese? Seriously?