Is coffee healthy or harmful? Scientifically speaking, the positive effects outweigh the negative ones when consumed in moderation: Coffee can support the heart, brain, and liver. However, there are exceptions—especially for pregnant women and other high-risk groups.

The most important ingredients of coffee

Coffee contains over 1,000 bioactive substances – some of which have a direct effect on our organism. Among the most well-known are:

  • Caffeine: stimulates the central nervous system, promotes alertness and concentration
  • Antioxidants (chlorogenic acids): have a cell-protective and anti-inflammatory effect
  • Diterpenes (cafestol, kahweol): can affect cholesterol depending on the preparation
  • Polyphenols: support cardiovascular system and metabolism


Chlorogenic acid: bitter substances with side effects

Chlorogenic acid is a natural compound in coffee beans that has antioxidant properties—which is actually beneficial. However, if coffee is roasted too briefly or at too high a temperature, as is often the case with industrial mass roasting, a high proportion of this acid remains. And then there's a problem: An excess of chlorogenic acid can not only make coffee bitter and difficult to digest, but can also cause stomach irritation and heartburn.

In contrast, artisanal drum roasting, in which the beans are roasted gently and slowly at medium temperatures (12 to 20 minutes instead of just 90 seconds), significantly more or even all of the chlorogenic acid is broken down. This explains why artisanally roasted coffee, like the one you find here, is usually milder and easier on the stomach—and why the choice of roast can have a major impact on the effect of coffee on your body.


The health benefits of coffee

Numerous studies today prove that coffee is not only safe for most people, but even beneficial to their health. Here are some proven effects:


Cardiovascular system

  • Coffee can reduce the risk of stroke and coronary heart disease (with moderate consumption)
  • There is no increased risk of high blood pressure in regular coffee drinkers


Brain & Psyche


Metabolism & Liver

  • Studies have shown that consuming 3 to 4 cups of coffee daily reduces the risk of type 2 diabetes
  • Coffee consumption can reduce the risk of fatty liver and liver cancer
  • Slightly supports fat burning (thermogenic effect)


Always remember, coffee isn't a guarantee of good health, nor is it a substitute for a healthy diet and sufficient exercise. Coffee can only provide support in some areas.



Are there any health risks?

Yes, unfortunately – especially in cases of excessive consumption or in certain risk groups.
Too much caffeine can...

  • ...cause sleep problems, restlessness and nervousness
  • ... lead to increased heart rate and palpitations
  • ... may also cause stomach problems in sensitive people

For whom coffee can be problematic

  • Pregnant women: max. 200 mg of caffeine per day (approx. 1–2 cups) recommended (or switch to decaffeinated coffee )
  • People with cardiac arrhythmias or anxiety disorders should also not consume coffee
  • Children & adolescents: should only consume caffeinated drinks in very small quantities
  • If you are taking certain medications (blood pressure lowering, antidiabetics, anticoagulants, antidepressants and thyroid hormones), you should avoid coffee (or caffeine)


Does coffee really dehydrate the body?

The myth that coffee dehydrates the body and thus has a dehydrating effect persists—but has long been scientifically disproven and is also somewhat far-fetched. While caffeine does have a mild diuretic effect, this effect is significantly reduced with regular coffee consumption. The body adapts to the caffeine, so fluid loss is minimal and is completely compensated for by the water contained in coffee. (Coffee is approximately 98% water.)

Studies show that, when consumed in moderation, coffee is definitely part of your daily fluid intake. The German Nutrition Society (DGE) and other international health organizations therefore do not classify coffee as dehydrating.

How much coffee is healthy?

The European Food Safety Authority (EFSA) recommends a maximum daily caffeine intake of:

group of people maximum caffeine intake (mg/day) corresponds approximately
Healthy adults 400 mg 3-5 cups of filter coffee
Pregnant & breastfeeding women 200 mg approx. 1-2 cups
Teenagers (50 kg) 100 mg max. 1 cup


It's important to note that caffeine isn't the only thing that contains coffee . Caffeine can also be found in cola, cocoa, chocolate (anything made with cocoa), tea, and, of course, energy drinks, as well as many other foods and beverages.

Coffee preparation: filter vs. French press?

The type of preparation influences the effect:

  • Filter coffee: contains fewer diterpenes and is therefore more cholesterol-friendly
  • Unfiltered methods (e.g. French Press, Mocha): contain more cafestol and kahweol
  • Cold Brew: is milder, gentler on the stomach, but also contains a lot of caffeine

The magic word is: pure!

Coffee is beneficial to your health as long as you consume it pure. As soon as you add milk or milk alternatives, or even sugar, everything changes. Then fats, carbohydrates, and other substances come into play.


Conclusion: Coffee – healthy or not?

Overall, current scientific findings clearly support this:
Coffee is healthy – when consumed in moderation and without added sugar.
It provides antioxidants, can protect vital organs, and boosts mood. However, those who are sensitive to caffeine or are pregnant should limit their consumption or perhaps switch to decaffeinated coffee, which is also available in top quality without compromising on flavor.

FAQ – Is coffee healthy?

How much coffee a day is healthy?

According to EFSA, up to 400 mg of caffeine per day (approximately 3–5 cups of filter coffee) is considered safe for healthy adults.
Can coffee damage the heart?

Moderate coffee consumption does not increase the risk of heart disease—in fact, studies even show a protective effect. The decisive factors are the amount consumed and individual tolerance—in this case, those who consume too much coffee also risk negative health effects.
Is decaffeinated coffee healthier?

Decaffeinated coffee also contains many antioxidants, but without the stimulating effects of caffeine. It may be a better choice for sensitive individuals or pregnant women.
Does coffee raise blood pressure?

Caffeine can increase blood pressure in the short term, especially in occasional users. This effect usually disappears with regular coffee consumption. In the long term, there is no increased risk with moderate consumption.

Here you can find coffees with potentially healthy ingredients

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