American Heart Association Reports 400 Milligrams of Daily Caffeine Is Safe for Most Adults

Most adults can safely consume up to 400 milligrams of caffeine—the equivalent of five 8-ounce cups of coffee—per day without increasing their risk of cardiovascular disease, according to a new scientific statement from the American Heart Association. Published today in the journal *Circulation*, the report identifies this level of intake as potentially linked to a lower risk of heart-related issues for some individuals, while simultaneously warning that higher doses found in certain energy products may pose health risks.

The statement, titled “Caffeine and Cardiovascular Disease,” categorizes caffeine as the world’s most widely used psychoactive substance, with coffee serving as the primary delivery method for most consumers. While the research establishes a safety threshold for moderate coffee consumption, it highlights a distinction between traditional coffee and other caffeinated beverages. The authors note that the high concentrations of caffeine found in energy drinks and concentrated energy shots carry a greater potential for cardiovascular harm. These findings provide updated clinical guidance on how varying levels of caffeine intake interact with heart health.

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Date: July 20, 2026

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