Anecdote - I've used it dozens of times and I'm always foggy in the AM, so I avoid it if I have to be sharp the next morning. Perhaps it's a coincidence and this study is flawed, but I can believe it pretty easily.
same here.
I use 5HTP instead, apparently the same chemical pathway just goes in at a different point. no fog in the morning at all. Nice and sharp, feel good.
same here. I use 5HTP instead, apparently the same chemical pathway just goes in at a different point. no fog in the morning at all. Nice and sharp, feel good.