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Side effects of too much caffeine intake

Side effects of too much caffeine intake

Tea and coffee are wonderfully healthful drinks. The majority of them contain caffeine, which may improve mood, metabolism, and both mental and physical performance. Additionally, studies have indicated that when consumed in low- to moderate amounts, it is safe for the majority of people. However, excessive caffeine may have negative, even harmful, adverse effects.

According to research, your genes play a significant role in determining how tolerant you are to it. Some people can eat a lot more coffee than others without getting sick. Additionally, those who are not acclimated to caffeine may have symptoms even after ingesting what is usually regarded as a moderate quantity.

Here are some negative effects of caffeine overuse.


The term “psychostimulant” refers to a chemical that stimulates the central nervous system, such as caffeine. For this reason, many individuals use coffee or caffeinated tea as a morning stimulant. Caffeine is occasionally used to treat pain, such as in the pain reliever Excedrin, which also contains aspirin and paracetamol. However, headaches can be brought on by both ingesting too much coffee and quitting it.

“Caffeine rebound” is a reaction that caffeine can cause. This means that after consuming a lot of caffeine, withdrawal symptoms could set in after the early advantages have faded. Caffeine can be consumed in moderation, according to the National Headache Foundation. However, if you have recurrent headaches, it’s advised to avoid everyday use.

Trouble sleeping

Caffeine can have a mildly disruptive effect on sleep when taken close to bedtime. Caffeine use before bed can affect the duration and quality of sleep as well as make it more difficult to get to sleep and stay asleep. Caffeine should be avoided up to six hours before bedtime.

But with time, the effects of coffee on your sleep won’t be as bad if you consistently take it. Caffeine’s effects can be adapted to by your body, which can also develop a tolerance to it over time.

High blood pressure

Most people don’t seem to be more prone to heart disease or stroke when they consume caffeine. But multiple studies have shown that it raises blood pressure due to its stimulating effects on the nervous system. High blood pressure increases your risk of suffering a heart attack or stroke because it may eventually harm your arteries and restrict the flow of blood to your heart and brain. Fortunately, caffeine only seems to briefly increase blood pressure. Additionally, it appears that people who are not used to consuming it are the ones who are most impacted.

Additionally, it has been shown that both healthy and mildly hypertensive people experience an increase in blood pressure while exercising when they consume a lot of coffee. The time and dose of caffeine must therefore be carefully considered, especially if you already have high blood pressure.


Caffeine use can also contribute to irritation, however, this has mainly been seen in those who consume large amounts of it. However, if you already suffer from a psychological or anxiety issue, you might become agitated with less coffee than usual.

You might want to cut back if you become irritated or furious after ingesting caffeine, even if additional research is needed to determine the precise amount of caffeine that causes irritability.

Increased Thirst

According to research, some people may get more thirsty even with small amounts of coffee. Even after only one cup of coffee, thirst was the most noticeable side effect for casual caffeine users. Those who regularly consume coffee were unable to feel thirst at this intensity.

There is no proof that excessive coffee intake affects thirst. However, high caffeine levels probably are to blame for your thirst.

Bottom line

Caffeine is likely a component of your everyday routine if you’re like most folks. Typically, it won’t cause any health issues. But be aware of any potential negative effects from caffeine and be prepared to reduce your intake if required.

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