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How much caffeine is too much?

Do you drink just one cup of coffee or two first thing in the morning, hoping the caffeine will help you boost your productivity throughout the day? Does it matter how much coffee we should drink?

According to scientists at the FDA, caffeine can be part of a healthy diet for most people, but too much caffeine may be dangerous to your health. Depending on factors such as body weight, medications you’re taking, and individual sensitiveness, “too much” can vary from person to person.

Here are some side effects of too much caffeine.


Caffeine is well-known to increase alertness. It works by blocking the effects of adenosine, a brain chemical that makes you feel tired (source: Healthline). At the same time, it triggers the release of adrenaline, the “fight-or-flight” hormone associated with increased energy. However, at higher doses, these effects may become more pronounced, leading to anxiety and nervousness.


Not sure why you can’t sleep at night? It might be because of your caffeine intake, make sure to regulate it and build a habit of drinking coffee at a specified time of the day. For example. Don’t drink coffee around 5PM onwards because the effect of coffee will retain in your body for about 3 to 5 hours according to a study and its takes time for your body to eliminate it causing challenges with in terms of sleeping.

Increase Heart Rate

The stimulatory effects of high caffeine intake may cause your heart to beat faster. 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 (source: Healthline). However, this effect doesn’t seem to occur in everyone. Indeed, even some people with heart problems may be able to tolerate large amounts of caffeine without any adverse effects.


A headache is a very common condition that causes pain and discomfort in the head, scalp, or neck. It’s estimated that 7 in 10 people have at least one headache each year. But, did you know that a headache can be a sign of coffee overdose too? Study found that it’s one of the effects of too much coffee so, make sure to try to consume this with an adequate amount per day.


Caffeine can be addicting if you consume it too much than the recommended amount per day. There are numerous studies that it may lead to psychological or physical dependency, especially at high dosages.


To prevent having these uncomfortable effects of caffeine overdose, avoid consuming excessive amounts of caffeine. In most cases, you shouldn’t have more than 400 mg of caffeine per day and even less if you’re particularly sensitive to caffeine.

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