Bibliography:

*http://en.wikipedia.org/wiki/Alkaloid

*http://en.wikipedia.org/wiki/Caffeine

*http://www.wisegeek.com/what-is-caffeine.htm

*http://www.energyfiend.com/the-caffeine-database

*http://www.xs4all.nl/~4david/caffeine.html

*http://ndarc.med.unsw.edu.au/NDARCWeb.nsf/resources/NDARCFact_Drugs6/$file/caffeine+fact+sheet.pdf

*http://www.nlm.nih.gov/medlineplus/highbloodpressure.html

*http://www.steadyhealth.com/

*http://www.howstuffworks.com/caffeine.htm

*http://www.americanheart.org/presenter.jhtml?identifier=4473

*http://faculty.washington.edu/chudler/caff.html

*surveymonkey.com

http://www.righthealth.com/Health/What_Is_Caffeine/-od-definition_wiki_Caffeine-s