Thanks for the info. After his first year life, the Dr’s said that his level would not change and there was no need for any kind of follow-up. I did not know one’s levels could change as you get older. nBut I will have him tested again. I think his levels hovered around a n6 or 7 if I remember correctly. When he was 14 or 15 years old we checked again and it was still in the 6-7 range. What is the acceptable limit now? Before any dietary restrictions are needed? thanks again.