I found this today on a computer gaming forum:
Has anyone tried it? It's a relatively new product that's designed to increase your concentration. I just bought my second bottle. It's absolutely incredible. I first tried it last summer when I was taking classes. At times, I studied for four or five hours without cessation.
You can read more about it here:
It's marketed for weightlifters; I originally saw it in Flex magazine. I've never taken it before the gym because I usually work out late at night and wouldn't be able to sleep afterward, but I've heard that it noticeably increases performance.
One really nice effect that it has on me is an improvement in how well I speak. Words flow a lot easier, and I'm more willing to spark up conversations with people who I normally wouldn't talk to. The guy who designed the product attributes it to an overall improvement in cognition.
Even us nerds need performance enhancement.