I too have trouble with all vitamins, medications and cheese. I have been doing research about "tannin" allergy and it seems to fit me. Tannin is a plant phyenol (my spelling is poor) I noted that cellulose is made from plants. I have trouble with fruit juices, (high in tannin) cheese (ananto - tannin) Tea, coffee, wine, grapes, berries, black beans, soybeans...