The world has been on a caffeine high ever since. There are many controversies over the benefits and side effects of caffeine and coffee. I thought you might be interested in some facts on this subject. The authors report not only on their own findings, but also combine them with the findings from 281 other scientific articles.
Caffeine is the most frequently studied chemical in coffee, but there are hundreds of others.
One of these is chlorogenic acid, which may have detrimental effects on our bodies. Caffeine's effects on the heart can be critical. In non-coffee drinkers caffeine will increase the blood pressure and the heart rate, often making people jumpy and jittery. Two studies showed a two fold increase of heart attacks in people who drink more than six cups of coffee daily. However more recent investigations have failed to support this finding.