<<Disclaimer: Verify this information before applying it to your situation.>> Greetings All Thought some of you might be interested in the book "A Consumer's Dictionary of Food Additives" by Ruth Winter, M.S. Ive noticed people asking about sulfites, FD and C colors etc. The book contains definitions of ingredients and additives found in most foods. It does not say if an additive contains gluten, however, it does give info on what kind of reaction (if any) is associated with what additive etc. I bought my copy awhile back, and I think I paid around $15.00. Im not able to eat foods that contain additives of any kind any more but Ive found the book useful when others have asked about an ingredient. Patti