Unfortunately, yes. Neurological signs/symptoms may appear even after the diet is started, and in some cases may not be influenced by the diet because they’ve been brewing in your body for quite a long time.
(Updated .)Keyword: neurological
When you say that undiagnosed celiac disease could lead to neurological problems, what do you mean?
“Neurological” could refer to neuropathy, ataxia, headaches and, although rare, epilepsy (when associated to documented bilateral occipital calcification).
(Updated .)