I was tested years ago, negative. However, I am persuaded by the arguments of dr perlmutter in The Grain Brain, that gluten can be toxic to the cns even in the absence of obvious gut damage. Also, I'm from the west of Ireland which has one of the highest rates of celiac in the world and lots of sub clinical sensitivity. And I have Parkinson's disease which might be due to leaky gut and b12 def exacerbated by mthfr snp.