The effects of coffee: Healthy habit or risk?

← Back to the blog Smúz Blog · 2025. 10. 06.

Coffee is one of the most popular pleasures worldwide, consumed in various forms on a daily basis. Caffeine, the main active ingredient in coffee, is known for its invigorating and stimulating properties. However, it is important to understand that the effects of coffee not only affect our well-being, but also our long-term health. In the following, we will review the beneficial and harmful effects of coffee, as well as the basic principles of conscious coffee consumption.

The beneficial effects of coffee

1. Mental freshness and concentration

Caffeine stimulates the nervous system, improves concentration and reduces the feeling of tiredness. The effect of a morning coffee can be especially useful at the start of the day, as it boosts alertness and reaction time.

2. Long-term health benefits

Recent research suggests that drinking 1-2 cups of coffee a day may contribute to long and healthy aging. A study analyzing data from more than 47,000 women found that regular coffee consumption was associated with better mental and physical well-being.

3. Reducing the risk of chronic diseases

Coffee consumption has been linked to a reduced risk of heart disease, stroke, and certain cancers. One large study found that people who drank 3-4 cups of coffee a day had a lower risk of these diseases, but it's important to note that this association is not proven and may vary from person to person.

Negative effects of coffee

1. Poor sleep quality

The stimulant effects of caffeine can disrupt sleep because it blocks the effects of a compound called adenosine, which contributes to feelings of fatigue and sleepiness. Especially when consumed late in the afternoon or evening, caffeine can cause sleep disturbances, restlessness, and decreased energy levels by making it difficult to fall asleep and affecting the quality of sleep. 

2. Digestive problems

Excessive coffee consumption can irritate the stomach, cause acid reflux, and increase the risk of stomach ulcers. Since stomach health is of utmost importance, it is advisable to drink coffee made from quality coffee beans, which is gentler on the digestive system and provides a richer taste experience.

3. Caffeine allergy and sensitivity

Although rare, some people may experience allergic reactions to coffee, such as skin rash, itching, or difficulty breathing. These symptoms require immediate medical attention.

Conscious coffee consumption

• Quantity and timing: Moderate consumption of 2-3 cups of coffee per day can have beneficial effects on health. However, it is important to consume coffee in the morning or early afternoon to avoid impairing sleep quality.
• Coffee types and alternatives: Specialty coffee shops offer coffee with different milk variations (oat, almond, coconut) to explore new flavors. These alternatives can be especially useful for those with lactose or milk protein allergies.
• Decaffeinated options: Decaffeinated coffee also has many benefits, including its antioxidant content that may help protect cells. This is especially recommended for those who are sensitive to caffeine or are pregnant.

Moderate coffee consumption not only enhances mental alertness, but may also help reduce the risk of chronic diseases and maintain long-term health. 

Of course, as with everything, it's worth being careful not to overdo it, as it can impair sleep quality or cause digestive problems. However, if you consciously enjoy coffee, in the right amount and at the right time, you can really get the best effects from it. 

If you’re looking for a special coffee experience, at Smúz, a specialty café in Budapest in one of the city’s most beautiful areas, you’re sure to find your perfect choice - whether a silky flat white, an energising espresso or an exciting new creation.

If you are interested in more interesting facts from the world of coffee, learn more at about the history of coffee!