• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

I Need Coffee

By Coffee Fans, For Coffee Fans!

  • Coffee Brewing Guide
  • About INeedCoffee
You are here: Home / Coffee and Health / Blood Pressure and Coffee

Blood Pressure and Coffee

November 1, 2007 by Chris Arnold

Blood Pressure and Coffee

There have been some irresponsible articles written over the years, that assure the reader that drinking coffee will not raise your blood pressure. And if you are interested in lowering blood pressure, you may be one of many that should consider the effects of coffee on blood pressure.

This article will try to be as informative and balanced as possible, though some aspects of this issue are in fact uncertain. None of the information contained in this article should be taken as medical advice. As always, you should consult your doctor regarding any changes you are contemplating in your diet or behavior, before delving into an attempt to reduce blood pressure.

Caffeine and High Blood Pressure

We all know coffee contains caffeine. But what is the relationship between caffeine and blood pressure? And we have all heard that caffeine is a stimulant, but what does that really mean? What does a stimulant do in the body at a real-world level? Well, it can cause jitters, nervousness, and yes, high blood pressure – for some. But there are so many scenarios and variables to consider. For instance, are you a long-term coffee drinker or an occasional? Are you male or female? Do have a family history of high blood pressure? Do you already have signs of high blood pressure?

Most studies show the amount of caffeine in two American cups of coffee (about 8 ounces each) can raise your systolic blood pressure from 3 to 14 mm Hg and diastolic blood pressure from 4 to 13 mm Hg, at least in the short term. One study does show much lower numbers, but an increase is associated nonetheless.

blood pressure
Photo by Bernand Goldbach

Studies in Coffee and Caffeine

One 12-year study of 155,000 women showed some very interesting results. While drinking caffeinated cola was associated with an increase in blood pressure, drinking coffee did not produce the same results. The study went on to suggest that those women who drank caffeinated coffee actually may have had a reduced risk of high blood pressure.

We do know that in general, those who don’t normally consume caffeine usually have a sharp temporary rise in blood pressure shortly after consuming caffeine. How this happens could be from one or more causes. One common view is that caffeine narrows the blood vessels by blocking the hormone that normally keeps them open – adenosine. Caffeine also can stimulate cortisol and adrenaline to be released, which can cause a direct increase in blood pressure.

However, some recent research would suggest that long-term, regular coffee drinkers actually develop a tolerance to caffeine, and their blood pressure is not increased substantially over the long term, though this seems to be a minority view.

Caffeine Intake

Some doctors recommend against caffeine just before physical activity, which already raises your blood pressure naturally. Some doctors also suggest limiting caffeine intake to about 150-200 milligrams per day. See this chart for some coffee drinks (and other caffeinated beverages) and their corresponding caffeine content:

8 oz. of Drip Coffee110-180 mg
8 oz. of Brewed Coffee75-140 mg
2 oz. of Espresso100 mg
8 oz. of Iced Tea50 mg
8 oz. of Brewed Tea40-60 mg
8 oz. of Green Tea15 mg
8 oz. of Hot Cocoa15 mg
8 oz. of Red Bull80 mg
12 oz. of Jolt Cola70 mg
12 oz. of Pepsi Cola40 mg
12 oz. of Coca Cola Classic35 mg

Not Just Blood Pressure

According to a 1999 Duke University Medical Center study of 72 regular coffee drinkers, those who drink four to five cups of coffee throughout the morning, not only have elevated blood pressure but also higher levels of two stress hormones – adrenaline and noradrenaline – lasting all day and into the evening. The body thinks that it is under stress the entire time. Both adrenaline and noradrenaline are useful for making decisions in times of stress but can be harmful to the heart if elevated over a long period of time. It can also weaken the immune system, and damage blood vessels.

Conclusion

The evidence is mounting that caffeine and coffee do increase blood pressure. It seems what is up for debate is how much. If you want to lower blood pressure, reducing or eliminating coffee and caffeine can be a step that you and your doctor can discuss. If you have a caffeine addiction, also consult your doctor, as the cold turkey approach may not be good for all.

Resources

Does Coffee Raise Blood Pressure? – Another view on the relationship between coffee and blood pressure.

Accelerated Caffeine Detox – INeedCoffee article.

  • Author
  • Recent Posts
Chris Arnold
Chris Arnold
Chris is the creator of Two Bit History. You can follow Two Bit History on YouTube.
Chris Arnold
Latest posts by Chris Arnold (see all)
  • Coffee Grind Chart - September 6, 2020
  • Clever Coffee Dripper Review - March 4, 2019
  • The Coffee Martini (3 Recipes) - December 15, 2018

This article first appeared on INeedCoffee.com. Filed Under: Coffee and Health

Primary Sidebar

Search

Connect

  • RSS
  • Twitter

Newsletter

Sign up here to receive our newsletter delivered by Follow.it.

Recent Posts

  • Life is Coffee Comics #41
  • How to Brew Vietnamese Iced Coffee
  • Life is Coffee Comics #40
  • Vietnamese Iced Coffee Brewing Tutorial by Inanimate Objects
  • Espresso Carrot Cake Recipe

Popular Posts

  • Coffee Grind Chart
  • French Press Coffee Tutorial
  • The Upside Down AeroPress Coffee Brewing Tutorial
  • Stovetop Espresso Brewing Tutorial
  • How to Brew Vietnamese Iced Coffee
  • Cold Brew Coffee is Not Rocket Science
  • Coffee Brewing Guide
  • Brewing Espresso in a Moka
  • Chemex Coffee Brewing – History and Tutorial
  • Making Green Bean Extract Beverages at Home
  • Making Cold Brew Coffee in a French Press
  • Buying a French Press – Picking the Right One

Sections

  • Brewing Coffee
  • Cafe Culture
  • Coffee and Health
  • Coffee Business
  • Coffee Comics
  • Coffee History
  • Coffee People
  • Espresso
  • Grinding Coffee
  • Recipes
  • Roasting Coffee
  • Tea
Copyright © 1999-2023 INeedCoffee is a project by coffee fanatic Michael Allen Smith. User Sitemap | Privacy Policy