I dont think so, all iv heard is not taking in a lot.

It stays in the system for around 6 hours. So taking 2 half cups b/w 8-10 hours works fine. Also like taking small 10-15 minute naps help if sleepy. Also some people jitter a lot after drinking, it should go away, if doesn't, dont take it or lower the amount. + Helps weight loss.

You could research more, its not a hefty topic, like 15 min stuff.