If anyone does any of their own research on PQQ, they'll find more and more claims backing up what I've stated. Really not understanding the negativity. It's a supplement with benefits that have been proven over and over again. If you don't need it or find it's effects aren't what you're after, then great don't use it. I simply have no reason to lie about it, I don't sell it or have a biased opinion. I feel the effects I stated more than likely due to the damage I caused myself over the last few years; someone with an optimal neurological function going into may not feel a thing; but it's not the case with me.