Caffeine makes your heart beat abnormally fast which is very harmful for people who have high blood pressure or a history of heart disease.

Caffeine constricts the blood vessels in your brain causing many people in get massive headaches.

Caffeine is a strong diuretic causing your body to become dehydrated and the #1 symptom of dehydration is fatigue.

Some people experience tremors after drinking caffeine. That’s thought to be due to over-activation of the central nervous system.

One recent report from the US revealed that women who drink in excess of one cup of coffee every day are only half as likely to be able to get pregnant as those who drink no coffee at all.

The odds are considerably worse if women drink more than two cups a day. Then they are nearly 5 times less likely to be able to get pregnant as women who drink no coffee at all.

Caffeine can cause tension or stiffness in your neck, shoulders, jaw, hands, legs or stomach.

Caffeine can cause mood swings or periods of depression during the day.

Caffeine can cause coldness in the extremities, especially in your hands and feet because it restricts circulation. This is very common side effect in women.

Caffeine can cause you to wake up feeling tired because it inhibits your bodies ability to sleep properly and get into REM sleep. Caffeine may also cause insomnia.

Over 400 billion cups of coffee are consumed every year, making it the world’s most popular beverage. In the United States alone, about 107 million people — over 52% of the population — drink coffee every day. Another 57 million people drink coffee at least occasionally.

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