Caffeine in the Yahoo! Directory

Wikipedia: Caffeine
Article about caffeine includes information on the history, effects, pharmacology, and extraction methods of pure caffeine.
en.wikipedia.org/wiki/Caffeine
How Caffeine Works
Explains how caffeine affects the body.
www.howstuffworks.com/caffeine.htm
Caffeine Archive
Devoted to caffeine and those of us who imbibe, brew, relish, and just plain love it.
www.caffeinearchive.com
Vivarin (Caffeine)
From GlaxoSmithKline. About vivarin, an over-the-counter caffeine tablet used to restore mental alertness or wakefulness when experiencing fatigue or drowsiness.
www.vivarin.com
Pro Plus
From Roche Products. Relieves temporary tiredness.
www.proplus.co.uk
Where is Caffeine Found?
Lists the caffeine content in beverages, foods, and drugs. Includes a daily caffeine consumption quiz.
www.headaches.org/consumer/caffeine_whitepapers/where.htm
National Geographic Magazine: Caffeine
Features articles and information about the world's most popular psychoactive drug.
magma.nationalgeographic.com/ngm/0501/feature1/index.html