Negative Effects of Drinking Coffee

Who do

Doesn’t like waking up and injecting your body with a jolt of caffeine? Most types contain caffeine, a substance that may boost your mood, metabolism and mental and physical performance. However, high doses of caffeine may have unpleasant and even dangerous side effects. Research has shown that your genes have a major influence on your tolerance to it. Some can consume much more caffeine than others without experiencing negative effects.

Here are 4 side effects of too much caffeine:


Caffeine is known to increase alertness. It works by blocking the effects of adenosine, a brain chemical that makes you feel tired. At the same time, it triggers the release of adrenaline, the “fight-or-flight” hormone associated with increased energy.

2. Insomnia

Studies have found that higher caffeine intake appears to increase the amount of time it takes to fall asleep. It may also decrease total sleeping time, especially in the elderly. You may not realize that too much caffeine is interfering with your sleep if you underestimate the amount of caffeine you’re taking in.

3. Digestive Issues

Coffee’s laxative effect has been attributed to the release of gastrin, a hormone the stomach produces that speeds up activity in the colon. What’s more, decaffeinated coffee has been shown to produce a similar response.

4. Rapid Heart Rate

It may also lead to altered heartbeat rhythm, called atrial fibrillation, which has been reported in young people who consumed energy drinks containing extremely high doses of caffeine. If you notice any changes in your heart rate or rhythm after drinking caffeinated beverages, consider decreasing your intake.

Recommended Reading