Caffeine consumption linked to varied cardiovascular health outcomes

Recent research presents nuanced findings regarding the relationship between caffeine consumption and cardiovascular health. A study led by the University of California-San Francisco and published in the Journal of the American Heart Association examined 1,388 participants over 12 months. The researchers found that regular consumption of coffee, tea, and chocolate was not associated with an increase in extra heartbeats, such as premature atrial contractions (PACs) or premature ventricular contractions (PVCs).

However, a separate large-scale study involving over 18,000 adults in Japan highlighted specific risks for individuals with severe hypertension. The study found that people with very high blood pressure (160/100 mm Hg or higher) who consumed two or more cups of coffee daily had approximately twice the risk of dying from cardiovascular disease compared to those in the same blood pressure group who did not drink coffee. Notably, drinking only one cup per day or consuming green tea did not show this same increased risk.