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Coffee and Endothelial Function: A Coffee Paradox?

Yukihito Higashi1,2

  • 1Department of Cardiovascular Regeneration and Medicine, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan. yhigashi@hiroshima-u.ac.jp.

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Coffee consumption

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Area of Science:

  • Cardiovascular research
  • Pharmacology
  • Human physiology

Background:

  • Coffee is a globally popular beverage containing numerous bioactive compounds, notably caffeine.
  • Caffeine is the world's most consumed psychoactive substance, found in various foods, drinks, and medications.
  • The relationship between coffee/caffeine intake and cardiovascular diseases (CVD) remains debated, with observed J- or U-shaped associations with events like myocardial infarction and stroke.

Purpose of the Study:

  • To review the molecular mechanisms and clinical implications of coffee and caffeine on human endothelial function.
  • To explore the potential "coffee paradox" or "caffeine paradox" concerning cardiovascular health and endothelial function.

Main Methods:

  • Literature review synthesizing existing research on coffee, caffeine, and endothelial function.
  • Analysis of studies examining molecular pathways affected by coffee constituents.
  • Evaluation of clinical data linking coffee consumption to cardiovascular outcomes and endothelial markers.

Main Results:

  • Evidence suggests complex effects of coffee and caffeine on endothelial function, influenced by various compounds and individual factors.
  • The "coffee paradox" highlights conflicting findings regarding coffee's impact on cardiovascular health.
  • Further research is needed to elucidate direct and indirect effects on endothelial health.

Conclusions:

  • Coffee and caffeine exert multifaceted effects on endothelial function, contributing to the ongoing debate on their cardiovascular impact.
  • Understanding these effects is crucial for clarifying the "coffee paradox" and providing evidence-based recommendations.
  • Future studies should focus on disentangling the specific roles of coffee's chemical constituents and their clinical relevance.