In my early 20s (28 now) I developed a host of odd allergies, probably because of life long antibiotic use. I became lactose intolerant - when I had cheese I'd get horrible pains in my stomach and terrible gas. I avoided dairy for a long time, then discovered that yogurt was safe for people who couldn't handle dairy, and so were goat milk products (like goat cheese). I added these to my diet. I love cheese. Finally - I decided to try to incorporate cheese back in my diet - well, sometimes I can handle it, sometimes I can't. I have found that aged cheese like Parmesan cause the most problems. Pizza doesn't agree (though it could be because of all the added grease) sometimes either. I just have to play it by ear. Lactaid milk does not cause me any problems. Also, I haven't had trouble with cottage cheese. Nowadays - I eat a LOT of cheese (I love the stuff) - I try to get low-fat cheeses (though I don't recommend low-fat cheddar), and for some reason, I haven't had any trouble with lactose intolerance for the past several months. Allergies, including food allergies, change throughout your lifetime. I'm sorry if my response isn't very helpful - it's just that you really have to test it out. If I have one bad night because I ate cheese, I'll avoid it for a few weeks, that try it again to see what happens. I know this sort of method is annoying but it's all I know that works. <img src="i/expressions/face-icon-small-smile.gif" border="0">Piper