Can Caffeine Affect Blood Pressure? Reliable Sources

Can Caffeine Affect Blood Pressure? Reliable Sources

The question most coffee lovers ask, can caffeine affect blood pressure? Before tackling the issue from a scientific point of view from highly esteemed medical institutes and resources, let me point out the following.

Billions of people around the world drink coffee daily, it has become one of our daily habits and for some an addiction.

We all know what the reasons behind that are. Coffee is super delicious, helps us start our day, stimulates alertness, and enhances our social engagements, among many other reasons.

Does Caffeine Raise Your Blood Pressure


Our relationship with coffee became a personal one; many drink a cup while at work when studying, and some when writing a blog post, everyone has perfect timing for a perfect cup!




Its popularity is growing by the minute, no wonder, the variety of coffee is mindboggling from French Press to Balck Coffee, Turkish to Espresso, every race, and country make it to its taste and incorporate it in the tradition of the nation itself.

A simple Google Trends search for the term “coffee” is very revealing; from 2004 to 2020, the demand and interest are consistently growing.


coffee demand statistics


So What is Caffeine?

Caffeine falls under the category of the central nervous system stimulant.

Worldwide, It is a legal, unregulated psychoactive drug that is a chemical substance that alters brain function, causing changes in mood, perception, cognition, behavior, and consciousness.

As of 2014, 85% of American adults consume, on average, 165mg of Caffeine daily from caffeine-containing beverages like coffee, cola, Pepsi, tea, etc.

The US Food and Drug Administration (FDA) classified Caffeine as generally recognized as safe (GRAS) if consumed moderately no more than 400 milligrams per day, which is equivalent to around 4 cups and depending on each consumer sensitivity.

Many pieces of research discuss the topic of Caffeine’s effects on blood pressure; the most credible are those of Harvard University, Mayoclinic, and Healthline.


Caffeine effects on blood pressure

1-Harvard University On Caffeine and High Blood Pressure:

According to an article published by Harvard Medical School in March 2014, most doctors recommend patients to abstain from caffeinated beverage before their blood pressure test based on the idea that caffeine increases the blood pressure and cause an inaccurate measurement.

Medical researches showed conflicting verdicts, while some studies indicated a correlation between drinking coffee and hypertension, other studies did not, and others went as far as to claim that caffeine may help decrease blood pressure.

A collaboration between scientists from Switzerland and the US decided to perform meticulous studies on 15 healthy volunteers, none of them had a history of high blood pressure, nonsmokers with only 6 of them to be regular coffee consumers.

The study concluded that Caffeine does increase blood pressure in non-consumer subjects, and youngsters but not in habitual consumers. Also, ingredients other than Caffeine contributes to hypertensive results.

Harvard scientists concluded that there is no relation between coffee and the risk of coronary artery disease or stroke, even in heavy drinkers.

The two-year study included 45,589 men between the ages of 40 to 75.

The Scottish Heart Health study went even further by stating that coffee consumption can reduce the risk of heart disease.

Harvard’s study closing statement concluded that if you are bothered by Caffeine, stop or reduce your use, and if you enjoy it, drink it with pleasure while adopting moderation.

Source: Harvard Medical School health publishing.


Caffeine relation to blood pressure

2- Mayo Clinic On Caffeine and Blood Pressure:

Dr. Sheldon G. Sheps, M.D. from Mayoclinic, states that Caffeine can cause a short-termed significant increase in blood pressure without a clear cause of this increase.

Also, regular drinkers of caffeinated beverages have a higher average blood pressure than those who don’t. Regular drinkers develop a tolerance over time.

His advice is, consult your doctor whether you should stop or diminish the amount of caffeine intake.

If you have high blood pressure and you do physical exercises, you should avoid caffeine.

Another tip for you to check if you tend increased blood pressure due to coffee, check your blood pressure before and after drinking a cup, if you see a five to ten points increase in blood pressure, then you might be sensitive.

If you decide to reduce your intake, do so gradually to avoid withdrawal symptoms.

Source: Mayo Clinic.


3- Healthline On Caffeine and High Blood Pressure:

Healthline indicates that Caffeine may increase blood pressure for a limited period after consumption.
Thirty-four studies revealed that 200 to 300 mg of caffeine (1.5 to 2 cups) caused an increase in blood pressure for three hours after drinking.

Same as Harvard’s study, Healthline states that regular coffee consumers did not have the same impact on blood pressure.

In the long run, coffee does not have any effect on long term high blood pressure even on people who suffer from high blood pressure.

Moreover, Healthline mentions the numerous health benefits of coffee, including the reduction in heart disease risk and antioxidant effects due to bioactive compounds, which can benefit heart health.

Source: Healthline.

How does caffeine affect blood pressure

Should you be worried?

Three major institutes all agreed that Caffeine does increase blood pressure on a short term 3 hours basis, but does not make blood pressure increase in the long term, especially for regular consumers.

On the contrary, caffeine consumed through coffee has been praised by most medical institutes as having beneficial health benefits, including reduced coronary diseases, strokes, prevention of Alzheimer’s, cancer, etc.

To be on the safe side, moderation and common sense is the way to go.

Anything over-consumed can be dangerous; imagine, for instance, eating salads five times a day for a month wouldn’t that have a devastating effect on your health? Yes. Are salads super healthy foods? Of course.

For more information about coffee health benefits: What are the health benefits of Coffee? Based on recent studies.

Hope you found this article on how caffeine affects blood pressure to be beneficial, please share your comments and thoughts by leaving a comment below!



11 thoughts on “Can Caffeine Affect Blood Pressure? Reliable Sources

  1. Delicious coffee, I do a cup of coffee every day. Like you rightly pointed out, too much of everything is bad, even our nostrils were made too small size to moderate our intake of air. If God can reduce our intake of air, why should we abuse the use of drinks and food around us? Thanks for this note

  2. Well that was some good information to read about how does caffeine raise blood pressure. I have known for quite some time that it does but it is nice to know what the medical authorities have to say about it, especially Harvard Medical School researchers.

    I personally like coffee but I don’t drink it everyday and when I do it is never more than two or three cups, so my blood pressure is safe in that regard. However the problem I can see happening when it comes to high caffeine consumption is with energy drinks.

    There are so many different energy drinks, Red Bull, Monster, Rockstar, just to name a few. Most of these blends have caffeine in the equivalent of 2 and 3 cups of coffee. That is a serious intake all in one drink. I feel thiis is where caffeine could be dangerous. Thoughts?

    1. Hi Robert,

      Energy drinks caffeine level is super high for a single drink, one energy drink can contain what is up to 100 mg of caffeine. The problem is most of them do not mention the actual amount of caffeine.



  3. Many thanks to you for sharing such a wonderful article with us and for giving us such a beautiful description of high blood pressure. I am a working woman so we always have to drink coffee for work. I had high blood pressure problems due to excessive coffee consumption. 

    But one of the things I didn’t say is that I had this problem the day I drank extra coffee. In fact, nothing extra is good for the body. I have no problems with regular hypertension, only consuming excess coffee caused this problem. Now I do not drink excess coffee. Some of the important information I learned through your article is that coffee is appreciated for the beneficial health benefits of stroke, cancer, coronary diseases, prevention of Alzheimer’s, etc. 

    So in the end, everyone wants to say that it is not good to use anything extra to stay safe and we should moderate everything.

  4. Hi Jordan,

    My wife is a coffee lover and I don’t drink coffee much. However, the information you shared on Caffeine is informative and helpful. You answered the million dollar question here and I often advice my wife to reduce the consumption of coffee. That is from mugs to cups lol.

    Reports and studies of the three major institutes is an eye-opener and gave me helpful insights. I am going to share your article with my wife and for sure she will find value in it.

    As you mentioned, the bottom line is we need to stop consuming more not only coffee this applies to everything.

    1. Hi Paul,

      Moderation is the best practice, 3 to 4 cups a day are OK, but consulting a doctor when it comes to blood pressure is mandatory!



  5. Hello Jordan,

    I am actually glad you decided to elaborate on this because there seem to be genuine concerns of a somewhat close relationship between coffee and HBP. Obviously, those concerns are unmerited. We love coffee but not just for its awesome take and its role in enhancing our moods, but also for its health benefit. Like you pointed out, I think it all comes down to moderation.

    Great post.

    1. Hello Rhain,

      Coffee is a great beneficial drink if consumed in moderation and using high-quality pesticides free brands. The World Health Organisation has also removed it from the list of possible carcinogen substance, which is great news for all of us coffee lovers!



  6. Hello. Thanks a lot for sharing with us this amazing article. I go to the gym for about 6 years.
    Before each workout I drink coffee which gives me a lot of energy for my heavy workouts. I want to tell you that with each workout I measure my heart rate and blood pressure and this is constant and i have the recommended values. I read somewhere that when we doing intense exercise it is advisable to drink coffee before. For me this is the biggest benefit of coffee.
    Most people drink coffee in the morning. A study shows that 80% of them consume this coffee for its delicious flavor and not for its benefits. Thanks again for this article. I wish you much success.

    1. Hey,

      Most highly esteemed medical institutions are giving coffee and caffeine positive reports. As with anything, moderation is needed.



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