wombat_socho

Actually, that's not far off. It's a genetic trait that needs to be 'switched on'. That's the irritating thing about testing for it - all they can do is tell you if you can not have it. (which is helpfull in figuring out if it's celiac or crohns' disease).

There are people diagnosed at weaning, and those as adults (me). Generally the adult symptoms are 'mild' enough so people grit their teeth and bear it for a while. As it's malabsorbtion of nutrients, it's alot more apparent in childhood (kid does not grow). Plus most adults don't like talking about medical problems that involve their bathrooms.... In any case, there are all sorts of factors like age of first cereals, excessive cereal diets....