<<Disclaimer: Verify this information before applying it to your situation.>> Karen wrote... He said that he could do a biopsy before attempting a gluten challenge, because it is possible it would not be completely normal despite being gf for so long. Just wanted to add that this is exactly what happened to me. I had the biopsy after being GF for quite a while- about a year I think- and it still showed slight damage- just enough to finally give a definitive diagnosis. Its definitely a tough decision but for those of you who are deciding whether or not to get tested, do a biopsy etc. I thought I would mention that being GF doesn't automatically mean your biopsy will be a waste of time. Mine ended up telling me I needed to be more careful! and thanks to Karen and Pat for good Boston Dr. recommendations! Becca Boston, MA