I just wanted to throw this question out there. A few years ago I developed an allergy to alcohol. As a wine lover I decided not to give up, and to try again. I tried a few different Pinot's with no problem at all. However, I decided to try a glass of Riesling and my symptoms (severe burning and redness of the face) appeared almost instantly. Could someone explain to me the differences in production and grapes used that might be causing my problems? None of this makes sense to me. Thanks!