Cardiologists Set Daily Coffee Limit: Preparation Method is Key

Most healthy adults can safely enjoy three to five cups of coffee daily, according to new research from the American Heart Association. The organization's scientific statement, published in "Circulation," indicates that up to 400 mg of caffeine per day is not associated with increased cardiovascular risk and may even offer protective benefits.

Experts, led by Dr. Gregory M. Marcus of the University of California, San Francisco, found that regular consumption of black coffee without added sugar or cream is linked to a reduced risk of heart disease, heart failure, stroke, type 2 diabetes, and some arrhythmias. This finding offers good news to coffee lovers who were previously concerned about its impact on heart health.

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Our review of the latest research indicates that for most adults, consumption of up to 400 mg of caffeine per day – equivalent to five cups of coffee without added sugar or other substances – is safe and does not increase the risk of cardiovascular disease.

However, the way coffee is prepared significantly impacts its healthfulness. Cardiologists warn that adding sugar, flavored syrups, or large amounts of milk and cream can negate the potential benefits. Furthermore, they caution against excessive caffeine intake from sources like energy drinks, which can contain three to four times more caffeine per ounce than traditional coffee and may lead to adverse cardiovascular effects, including high blood pressure and heart rhythm disturbances.

The researchers also noted that individual responses to caffeine vary due to genetics, lifestyle, and other compounds in coffee. Therefore, a universal recommendation for everyone is not possible, and personal reactions should be considered.

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Large doses of caffeine, such as those found in energy drinks and energy shots, can cause harmful effects on the heart and should be avoided.