There is a question about physical and mental health on the ESTA form for visitors to the USA. Its about having a 'disorder' with associated 'behaviour' that could pose a threat to your 'safety or welfare'. I guess coeliac disease could change your 'behaviour' if you accidentally ate gluten, but I think it is okay to answer 'No' to the question on the grounds that 'behaviour is unlikely to occur'
(d) You had a physical or mental disorder with associated behavior that posed a threat to your property, safety or welfare or that of others, but that behavior is unlikely to recur.
Am I right?