I know the effects vary considerably, in my case it just happened to help me get rid of any headaches - travel, stress, caffeine withdrawal, lack of sleep, ever

I know the effects vary considerably, in my case it just happened to help me get rid of any headaches - travel, stress, caffeine withdrawal, lack of sleep, everything that used to give me a headache now doesn't (except for a hammer to the head :-). It's pretty weird, and it didn't make me any smarter, but I like the effects. I take 2.4 grams a day - any more is a waste, any less is not enough.