Probably, it'd be hard to say for sure. I personally don't take it every day and sometimes just take half of my dosage, to reduce tolerance. There definitely is

Probably, it'd be hard to say for sure. I personally don't take it every day and sometimes just take half of my dosage, to reduce tolerance. There definitely is a tolerance though and also a bit of Yerkes-Dodson law type deal at play, e.g. if I take to much I am also not productive. I would definitely say it increases my productivity output though overall.