Anyone heard of "fructose intolerance"?(PEDS)

Hi, ny nephew who is 2 1/2 yrs old wa "diagnosed"with fructose intolerance.He had sx of diarrhea for many months but is otherwise in great health,happy,gaining normally etc..The pediatric GI they were referred to said he had the above and gave a 13 page list of "good" and "bad"foods. Basically,it lets out most fruits and almost all veggies.Is this common? I couldn't find a thing on it in the lit or my web searches.

Thanks in advance!

[sharann, BSN, RN]

I guess not. I don't know either.