Are you the “coffee family” who must drink coffee every day?Coffee has become one of the essential drinks in daily life. Some people rely on it to refresh and resist fatigue at work; some people regard it as the only source of energy; and some people just raise their hands to live a habit.Recently, related research published in the Journal of the American Heart Association (JAHA) has shown that drinking coffee can help reduce the risk of AF.1 Study Interpretation The data of this prospective cohort study are from the American Physicians’ Health Study. A total of 18,960 physicians were selected, all males, with an average age of 66.1 years.The frequency of coffee citations was reported by the doctors themselves in the form of questionnaires, while the occurrence of AF was derived from the annual questionnaire and the subject’s medical records.The COX proportional hazard model was used to calculate the Hazard ratio (HR) of AF in different subjects.So, how much coffee can reduce the risk of AF?What is the mechanism of coffee to reduce the risk of AF?Below we reveal the answers one by one.2 How much do American doctors like coffee?Coffee drinking is very common among doctors in the United States. One reason is that hospitals in the United States have a very complete infrastructure, including cafes.American doctors enjoy more leisure time at work than Chinese doctors are at war.In well-known American dramas such as Grey’s Anatomy, Early Morning Monday, and Dr. House, we can see that coffee is a necessity for many doctors before going to work, during lunch breaks, and after surgery.From this study, of the 18,960 participants who participated in the study, 3,946 reported that they seldom drank coffee, and a total of 1419 people who drank 1 cup or less a week, and a total of 2-4 cups a week.1036 people, a total of 766 people who drink 5-6 cups a week, the above subjects did not drink much coffee and had not reached the daily level of coffee.The number of daily cups was 3453; the number of people drinking 2-3 cups daily reached 6432, the highest proportion; moreover, the daily coffee consumption reached 4 cups or more, totaling 1,908 people.It can be seen that more than half of the subjects drink at least one cup of coffee daily.3 How much coffee is most suitable?The study was followed up for an average of 9 years. Of the 18960 subjects, a total of 2098 patients had new AF.The study adjusted the age, smoking history, drinking history, and exercise of the subjects. The risk of atrial fibrillation was defined as 1 in subjects who had never taken coffee, and the risk ratios in the remaining groups were 0.85 and 1.07., 0.93, 0.85, 0.86, and 0.96.The results suggest that drinking 1-3 cups of coffee daily has the lowest risk (HR) of AF.4 Why does coffee reduce the risk of AF?According to previous views, drinking coffee is one of the causes of atrial fibrillation, because caffeine may cause sympathetic nerve excitement, cause a rapid heart rate, and then cause atrial fibrillation.So how do the results of this study be interpreted?According to the literature, caffeine can reduce the occurrence of atrial fibrillation based on the following mechanisms of action: The main active component of coffee is caffeine. Caffeine is a non-selective inhibitor of adenosine A1 and A2A receptors, thereby inhibiting adenosine-inducedAtrial action potential is shortened to reduce the occurrence of atrial fibrillation.Both caffeine and polyphenols in coffee have antioxidant effects, effectively prevent atrial remodeling, and are protective factors for the occurrence of AF.The disadvantage is that the study did not include female subjects.According to the author’s observation, in daily life, female compatriots love coffee more than men.How does drinking coffee benefit women’s AF?How many cups of coffee is appropriate for women daily?Let’s expect more research to reveal the answer.Finally, focus on the points: male compatriots, 1-3 cups of coffee a day, are you drinking right?The above content is only authorized by 39Health.com for exclusive use, please do not reprint without authorization of the copyright party.