Consumption of more than 600 milligrams a day can lead to stomach ulcers, irregular heartbeat, increased blood pressure and insomnia. Coffee is the world s most popular stimulant. According to the Rockwood Report, four out of five Americans drink coffee, consuming more than 400 million cups a day. To tell if you are caffeine dependent, eliminate caffeine completely from your diet for one day. If you wake up the next morning with a pounding headache and then intake caffeine and you feel better, then you are more than likely to be caffeine dependent.
Caffeine can also be harmful when it is combined with stress.
People who have high blood pressure should take it easy on the caffeine when they are faced in stressful situations. A study published in the American Journal of Hypertension suggests that caffeine can push one s blood pressure to an unhealthy level, which will ultimately lead to many serious problems.