what age
The youngest I heard of was a girl who is 15. There are posts about her on this board, but I can't find the link to her profile right now.
While I know it's not the norm, I'll tell you that this girl has had nothing but problems from day one. She had the RNY in February. The doctors can't figure out why she wont get better. Personally I think her body wasn't ready for a change like that, but that's a non-medical opinion.
Anyhow, there's what I know