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[HEALTH] · United States · 69 sources

American Heart Association says up to five cups of coffee a day are safe for most adults

The American Heart Association (AHA) released a scientific statement in the journal Circulation indicating that most adults can safely consume up to 400 mg of caffeine per day – roughly five 8‑ounce cups of black coffee – without increasing cardiovascular risk. The review links moderate coffee intake to lower incidences of heart failure, coronary artery disease, stroke and type‑2 diabetes, provided the beverage is consumed without added sugar, milk, flavored syrups or cream.

Higher caffeine exposures, such as those found in energy drinks and energy‑shot products, may raise blood pressure and trigger arrhythmias, the AHA cautions. Unfiltered coffee varieties (espresso, French press, Turkish or boiled coffee) contain cafestol, a compound that can elevate LDL cholesterol, so paper‑filtered or instant coffee is preferred for those concerned about lipid levels. The guidance is based primarily on observational studies, with a growing number of randomized trials supporting the association, but the AHA notes that individual responses can vary by age, genetics and health status.

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