[Xerces]

Originally Posted by infinity

Im not sure about L-Tyrosine concentrations. I know one thing for sure, allthough Caffiene isn't really good for you in high doses, lately I have been able to use it with different results thanks to the L-Tyrosine. I am able to stay engaged in a book for hours at a time without looking at the clock. Learning new things also helps. I like to play the drums, but apparently, classical music is known for improving concentration and math skills, while rap and heavy metal deteriorate math skills and focus.

are you serious?

what about psytrance :P