I realize this thread began in 2012, but if any of the posters who tried NAC would be willing to give even a short update on how it worked over time, I'd be grateful. The description by Swarmie, above, sounds SO much like my 6 year old--right down to the bathroom issue, and RightStart math :)--that I'm especially curious how he's doing now. I have started my son on NAC,but we are only on week 2. Thank you!!