Scientists Reveal Why Up to 5 Cups of Coffee a Day May Benefit Heart Health
Summary
Scientists say drinking up to five cups of caffeinated coffee a day is safe for most adults and might lower the risk of heart problems like heart failure and stroke. However, energy drinks with much higher caffeine levels can raise blood pressure and cause irregular heartbeats.Key Facts
- The American Heart Association (AHA) says up to 400 mg of caffeine daily (about 3-5 cups of coffee) is generally safe for adults.
- Moderate coffee drinking may link to lower rates of heart failure, coronary heart disease, and stroke.
- Coffee contains other helpful compounds besides caffeine, like antioxidants, which may improve heart health.
- Filtered coffee does not increase bad cholesterol (LDL), but unfiltered coffee can raise LDL because of a substance called cafestol.
- Past advice often told people with heart rhythm issues to avoid caffeine, but new research shows caffeine might protect against atrial fibrillation (an irregular heartbeat).
- The AHA warns that energy drinks have much more caffeine per ounce than coffee and can increase blood pressure and heart rhythm problems.
- Current evidence isn’t strong enough to recommend caffeine as a treatment, but future studies could clarify its effects on heart health.
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