How Much Coffee Is Too Much? Heart Experts Have a New Answer

Key Points:

• The American Heart Association's new scientific statement finds that consuming up to 400 milligrams of caffeine daily, roughly equivalent to five eight-ounce cups of coffee, is safe for most people's hearts and may even reduce cardiovascular disease risk.
• Moderate coffee consumption can be part of a healthy lifestyle, with some evidence suggesting benefits for conditions like type 2 diabetes, atrial fibrillation, heart attack, and stroke.
• Drinking between one and three cups of coffee daily might raise blood pressure in healthy individuals, while higher amounts could lower it; unfiltered coffee contains cafestol, which may increase LDL cholesterol.
• Consuming caffeine beyond 400 milligrams, especially from energy drinks or shots, is linked to increased risks of high blood pressure, irregular heart rhythms, and potentially fatal heart events.
• Energy drinks, less studied than natural caffeine sources, are more likely to be harmful, with documented cases of heart-related deaths linked to highly caffeinated beverages like Panera Bread’s discontinued "Charged Lemonade."