print email comment close Caffeine Content of Common Beverages URL: http://www.mayoclinic.com/health/caffeine/AN01211 Description: Quick reference to caffeine content of selected beverages, including coffee, tea, soft drinks, and energy drinks. Provides a brief introduction to caffeine, "a substance that exists naturally in certain plants. ... It can also be produced synthetically and added to foods and beverages." From the Mayo Foundation for Medical Education and Research. Publisher: Mayo Foundation for Medical Education and Research Extra Keywords stimulant LII Database Information: Record 22663 created by Jennifer English on 09/25/2006 Last modification on 09/25/2006 Last review by Charlotte Bagby on 07/17/2007 Published: 09/28/2006   Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/22663