Story perspectives

Study: Coffee May Reduce Atrial Fibrillation Risk by 39%

11/10/2025

Summary

Story summary

A DECAF trial by the University of Adelaide and the University of California, San Francisco (UCSF) finds coffee may protect against atrial fibrillation (AF).
In the 200-part DECAF trial, coffee drinkers had a 39% lower risk of recurrent AF than non-drinkers.
Researchers cite diuretic effects, activity increases, and anti-inflammatory ingredients as mechanisms.
The findings challenge the view that coffee worsens rhythm disorders and may alter caffeine advice for AF patients.

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Story summary

A DECAF trial by the University of Adelaide and the University of California, San Francisco (UCSF) finds coffee may protect against atrial fibrillation (AF).
In the 200-part DECAF trial, coffee drinkers had a 39% lower risk of recurrent AF than non-drinkers.
Researchers cite diuretic effects, activity increases, and anti-inflammatory ingredients as mechanisms.
The findings challenge the view that coffee worsens rhythm disorders and may alter caffeine advice for AF patients.