Okay, what do you mean when you say there is no scientific evidence? There are dozens of other peer reviewed papers who say it does exist. There’s not a blood test for it but there isn’t for bipolar disorder either. Some neuropsychologists say that you can identify ADHD in brain scans. I really do get what you are saying and I even for my child, I have recently found out that he is bipolar. So maybe he wasn’t ADHD all this time or maybe it’s both. I don’t know. What I do know, is something is wrong. It’s not the environment, it’s not something I’m doing or not doing. In addition, you mention that there is no place for stimulants. There are other ADHD alternatives. We were able to to help my son stimulant-free for four years.