Caffeine, Is It Safe?
http://www.health.uci.edu/services/nutrition/nutrition.html#caffeine
Yes. Coffee is safe if you consume it in moderate amounts. For most healthy adults, moderate amounts of caffeine – 200 to 300 milligrams a day, or about two to three cups of coffee – pose no physical problems (American Dietetic Association).
Caffeine is a mild stimulant, which is found in the leaves, fruits, and seeds of many plants. Tea leaves, coffee and cocoa beans, as well as kola nuts all contain caffeine.
Caffeine can be found in coffee, soda, chocolate, some pain relievers, cold remedies, weight control aids, and various prescription medications.
http://www.health.uci.edu/services/nutrition/nutrition.html#caffeine
