I guess I am in the minority here. My dd13, dx with high functioning Autism, has tried every therapy available. We have done the speech, OT, social skills groups, GFCF diet, DAN protocol, a wide variety of supplements, medication, seen psychologists and psychiatrists, neurologists and developmental pediatricians..... I could go on and on. None have greatly improved her overall functioning. This is not to say she hasn't improved in many areas over time, she has. But none if the aforementioned therapies led me to say "Wow, I can see a huge difference in her". I have now given up on restrictive diets, therapies, and large amounts of supplements. I feel I have finally come to terms with who she is and am no longer exhausting every avenue to "fix" her. She is perfect as is:) That said, I wouldn't do it differently. I have seen many of the things I have mentioned help other kids greatly improve. I would never deter a parent from exploring every avenue. I have and, though none of it proved to make much difference, I will never worry that I let her down because I failed to try something.