What I find helpful is a digestive enzyme product called Digest Platinum, by NOW Foods. All the enzymes are derived from microbial sources, not plants or animals. I chose this type because microbial enzymes can withstand the acidity of the stomach, thereby are able to make it into the rest of the digestive tract intact, where they can do their job. A similar product is made by Doctor's Best, which I find effective as well. Another nice thing about these products is the wide range of enzymes they contain, so that many different types of food components are addressed. Neither makes any claim of digesting gluten specifically, and I cannot say that it will help reduce symptoms of gluten exposure.