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Health benefits of coffee and its beneficial substances

Erik Šimšík | April 25, 2025

Coffee is not just caffeine. In one cup you will find a multitude of bioactive substances, many of which have antioxidant, anti-inflammatory, and neuroprotective effects. It is precisely because of this complexity that coffee is today perceived as a beverage with multiple positive health effects.

✅ 1. Reducing the risk of lifestyle diseases

➤ type 2 diabetes, Parkinson's, Alzheimer's, cardiovascular diseases

Regular coffee drinking (2–5 cups a day) is associated with:

  • lower risk of type 2 diabetes 
  • reduced risk of neurodegenerative diseases (Parkinson's, Alzheimer's),
  • lower mortality from cardiovascular diseases.

✅ 2. Support of mental performance and mood

➤ alertness, attention, mood, depression

Caffeine:

  • stimulates the central nervous system, increases attention, reaction time, mental alertness,
  • can help alleviate symptoms of depression and improve mood (thanks to dopamine and serotonin).

✅ 3. Antioxidants and anti-inflammatory effects

Coffee is the largest source of antioxidants in the Western diet. It even surpasses fruits and vegetables (source: American Journal of Clinical Nutrition).


🧪 Main health-promoting substances in coffee

1. Caffeine

  • Improves focus, physical performance, and mood
  • Increases metabolism and fat burning
  • May have a protective effect on the brain

2. Chlorogenic acids (CGA)

  • Strong antioxidants
  • Help regulate blood sugar levels
  • Have anti-inflammatory and antibacterial effects

3. Diterpenes (cafestol and kahweol)

(especially in unfiltered coffee like French press or espresso)

  • Support liver detoxification
  • May have anti-tumor effects

Note: in larger amounts they can increase cholesterol levels – especially in unfiltered coffee.

4. Polyphenols

  • Help reduce inflammation in the body
  • Protect cells from oxidative stress
  • May have a positive effect on the microbiome of the intestines

5. Trigonelline

  • A substance with antibacterial effects
  • During roasting, it transforms into niacin (vitamin B3), which supports metabolism and healthy skin

🔎 Conclusion

Coffee is more than caffeine. Thanks to its rich content of bioactive substances, a daily dose can be natural prevention against diseases, if drunk in moderation.

The recommended daily dose of caffeine according to Mayo Clinic is up to 400 mg daily (approximately 3–5 cups of coffee).