"The results suggest that mild to moderate intake of ground, instant and decaffeinated coffee should be considered part of a healthy lifestyle," said study author Peter Kistler, head of clinical electrophysiology research at the Baker Heart and Diabetes Institute and head of electrophysiology at Alfred Hospital in Melbourne.
"Does coffee make you healthy or do inherently healthier people consume coffee?" she asked. "Randomized controlled trials are needed to prove the relationship between coffee and cardiovascular health."The study used data from the UK Biobank, a research database which contained coffee consumption preferences on nearly 450,000 adults who were free of arrhythmia or other cardiovascular disease at the start of the study.
"Caffeine is the most well-known constituent in coffee, but the beverage contains more than 100 biologically active components," said Kistler, who holds joint appointments as professor of medicine at the University of Melbourne and Monash University. The link between coffee and a lowered risk for heart disease and stroke was not as robust: Drinking two to three cups a day of ground coffee lowered risk by 20%, while the same amount of decaf coffee reduced risk by 6% and instant by 9%.
In addition, coffee can produce negative side effects in some people, she added. People with sleep issues or uncontrolled diabetes, for example, should check with a doctor before adding caffeine to their diets.
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