Bibliography
If you need further information on anything that I may not have completely covered these sites will probably be able to help you. They are the ones I used and I highly recommend them.
Caffeine Facts:
http://www.astro.umd.edu/~sgeier/caffeine.html
Information on Effects of Caffeine:
http://net-abuse.org/~lizardo/caff.sources.html
Frequently asked questions:
http://www.seas.upenn.edu/~cpage/caffeine/FAQmain.html
Club Caffeine:
Caffeinated Beverages: