So no, you should not take something merely because it's "probably harmless".
You and I should not. But I'm also not going to bother correcting someneone taking homeopathy for a cold. It doesn't do anything. But unless it contains heavy metals, it also isn't hurting.
It doesn't make you a genius. I think a better view on it is that it may mitigate some of the adhs symptoms (at least for me).
I can keep on track for a significantly longer time since ive started supplementing with it at ~15g/day - and while i dont feel a difference, i can observe it when actually paying attention to what i do / how often i drift off etc.