<<Disclaimer: Verify this information before applying it to your situation.>> I've got one son who is a biopsy diagnosed celiac who had the blood test AFTER the biopsy and the blood test was negative. My two other kids were subsequently (blood) tested and were both negative but the GI thought that was enough testing. However, I've read the stuff on leaky gut/brain fog and I question whether that might not be the problem with my youngest--especially since the Celiac in our family would never have been diagnosed if we were to have relied on the blood test. Would a trial period of being gluten free help determine whether the youngest has a leaky gut problem? If so, for how long? hanks in advance for all your help. This list has been a wonderful support. Christine Christine Duncan Http://www.ChristineDuncan.com Safe Beginnings Http://www.Trebleheart.com Win Cash or Cool E-books at E-Writer's Valentine's Contest www.geocities.com/e_writers_today/contest.html