Coffee and Health: Myths vs. Facts, Here's the Scientific Explanation

IT DMK Cargo
2 days ago
3 min read

Coffee is more than just a morning beverage. It has become an integral part of the lifestyle of millions of people worldwide—from office workers to seniors enjoying their retirement. However, behind its delicious taste, coffee is often the subject of myths that may not be medically accurate.

From claims that coffee triggers heart disease to the belief that coffee causes fatigue due to dehydration, there is a lot of conflicting information circulating. This article reviews the latest facts about coffee’s effects on the body based on various scientific studies from credible institutions.

Coffee and Heart Health

One of the most common myths claims that coffee is bad for the heart. However, a recent study by the American Heart Association found that consuming 2–3 cups of coffee per day is actually associated with a reduced risk of heart disease and stroke. Furthermore, research from Tulane University shows that people who regularly drink coffee in the morning have a 31% lower risk of death from cardiovascular disease compared to those who do not consume coffee.

This effect is particularly evident in those who drink black coffee without added sugar or cream. Researchers conclude that the antioxidants and polyphenol compounds in coffee provide protection for blood vessels and the heart.

Coffee, the Brain, and the Risk of Dementia

Many people are unaware that coffee consumption also has a positive impact on cognitive function. A recent study from Switzerland found that elderly individuals who drink up to five cups of coffee per day exhibit higher brain function scores, even if they have heart conditions such as atrial fibrillation.

The caffeine, chlorogenic acid, and antioxidants in coffee contribute to neuronal protection and help inhibit the buildup of beta-amyloid plaques associated with Alzheimer's disease. This study offers hope that the habit of drinking coffee may slow cognitive decline as one ages.

Does Coffee Cause Dehydration?

This is an old myth that is still widely believed. In fact, coffee does contain caffeine, which has a mild diuretic effect, but it does not cause dehydration when consumed in moderation. According to the European Journal of Clinical Nutrition, consuming up to 3–4 cups of coffee a day still contributes to hydration.

The diuretic effect of caffeine is not strong enough to offset the fluid intake from the coffee itself. Therefore, there is no need to worry that drinking coffee will cause the body to become dehydrated, as long as it is accompanied by sufficient water intake.

Dependency Risk: Fact or Hyperbole?

Caffeine can indeed cause mild dependency effects, such as headaches or fatigue when suddenly stopping consumption. However, this is not equivalent to drug or alcohol addiction.

The symptoms that arise are usually mild and temporary. The Mayo Clinic states that caffeine is more of a “habit” than a severe addiction, and most people can stop or reduce their coffee consumption without serious consequences.

The Time You Drink Coffee Determines Its Benefits

The best time to drink coffee also plays a significant role. A study from the National Heart, Lung, and Blood Institute (NHLBI) shows that drinking coffee in the morning has a more positive impact than consuming it throughout the day.

“Drinking coffee in the morning can reduce the risk of overall mortality and heart disease. However, consuming it throughout the day neutralizes these benefits,” explains Dr. Jin Zhou, the lead researcher of the study.

For those who want to experience the health benefits of coffee, it is recommended to consume it before noon and avoid drinking it before bedtime.

Important Note: Not All Coffee Is the Same

Black coffee without additives (sugar, cream, syrup) has the highest health protective effects.
Ready-to-drink packaged coffee with high sugar content can increase the risk of obesity and diabetes.
The safe daily caffeine intake limit is 400 mg, or equivalent to 3–4 cups of coffee per day (source: Mayo Clinic, 2024).

Coffee Is Not the Enemy, But a Healthy Companion When Consumed Wisely

Coffee is not the cause of disease, as is often exaggeratedly reported. On the contrary, when consumed in moderation and at the right time, coffee can be an important part of a healthy lifestyle. From the heart to the brain, from the intestines to longevity—all indicate that coffee has a positive role that cannot be ignored.

However, it is important to remember that the quality of the coffee and how it is prepared determine its benefits. Choose high-quality pure coffee and avoid excessive added sugar or fat.