Why might someone with a gluten allergy have a reaction to gluten-free hummus?

Need more info. Difficult to say without knowing more. Wondering what kind of reaction you are referring to, the time course, symptoms, etc. There are many different reactions to foods including true allergic reactions, food intolerance, or immune-mediated inflammation to gluten in people with celiac disease. See an Allergist if you are concerned about an immediate allergic reaction to hummus.

Related Questions

What are the advantages and disadvantages of dieting gluten free if you don't have gluten allergy?

Not much. Please see my earlier healthtap answer just a few minutes ago on this very question. Thanks for your query. Read more...
Only disadvantages. If you don't have gluten allergy, restriction your diet from wheat and gluten is only putting a burden on your lifestyle. Plus, it is expensive to do so. The important rule about diet is a balance diet with everything in moderation. Regular exercise will make you healthy. Read more...

What to do if I have a gluten allergy but I'm still allergic to gluten free biscuits.?

Other ingredients. examine the other ingredients in the gluten free biscuits, also see if the gluten free biscuits were made in a factory that processes wheat because there may be some cross contamination. Read more...

I took a blood test to see if I had a gluten allergy a yr ago and nothing showed up, I have been gluten free for a yr and feel better. What does it mean?

Keep on keeping on. Regardless of the test, if you feel better there has to be something about gluten-containing foods that doesn't agree with you. Don't think too much about this. Do what makes you feel better. Read more...
Gluten sensitivity. How you feel is the ultimate test of whether you're sensitive to gluten. There are many mechanisms through which gluten may cause someone to feel worse ; they don't all show up in blood tests, which are good at diagnosing celiac disease but not the much more common non-celiac gluten sens. See http://bit.Ly/pqxxfe ; http://www.Celiaccentral.Org/non-celiac-gluten-sensitivity/testing-and-diagnosis/. Read more...