Drinking 3–5 Cups of Coffee Daily May Reduce Artery Blockage

If you’ve been told that your morning coffee habit might be harming your heart, a major new study from South Korea offers some reassuring data—especially if you drink between three and five cups a day.

The short answer? Yes, according to the research, people who drink 3–5 cups of coffee daily show fewer early signs of arterial blockage compared to those who drink none or more than five cups.

What the Study Looked At

Researchers in South Korea analyzed medical scan data from over 25,000 working men and women—professionals whose employers provided regular health checkups. None of the scans showed obvious outward signs of heart disease. But roughly one in ten participants had noticeable calcium buildup in their coronary arteries, the vessels that supply blood directly to the heart muscle.

Why Calcium Buildup Matters

Calcium deposits in the coronary arteries are among the earliest indicators that fatty plaque may be accumulating, gradually narrowing the passageways and increasing the risk of cardiovascular events like heart attacks. These deposits don’t always cause symptoms, but they’re a key warning sign of atherosclerosis—the medical term for artery hardening and blockage.

How Coffee Consumption Played a Role

When researchers cross-referenced the scan results with participants’ self-reported daily coffee intake—and adjusted for other factors like smoking, exercise, and family history of heart disease—they found a clear trend. People who reported drinking 3–5 cups of coffee per day had significantly less coronary artery calcium than those who drank no coffee or more than five cups daily.

What’s in Coffee That Might Help?

Coffee contains caffeine, a central nervous system stimulant, as well as hundreds of other bioactive compounds. While some earlier studies have linked coffee consumption to raised cholesterol or blood pressure—both risk factors for heart disease—others have pointed to potential protective effects. This study doesn’t identify which coffee compounds might reduce calcium buildup, but it adds weight to the idea that moderate coffee intake could support vascular health.

Frequently Asked Questions

How many cups of coffee per day were linked to fewer artery blockages in the study?

The study found that people who drank 3–5 cups of coffee per day had less coronary artery calcium buildup than those who drank none or more than five cups. That mid-range intake was associated with fewer early signs of arterial blockage.

Did the study find coffee prevents heart disease?

No, the study did not prove that coffee prevents heart disease. It found an association between moderate coffee intake (3–5 cups/day) and reduced coronary artery calcium, which is an early warning sign of atherosclerosis—not a guarantee against heart disease.

What is coronary artery calcium and why does it matter?

Coronary artery calcium refers to calcified plaque inside the arteries that supply the heart. It’s an early indicator that fatty deposits are building up, which can narrow the arteries and eventually lead to cardiovascular problems like heart attacks.

Were other factors like smoking or exercise considered in the results?

Yes, researchers adjusted the data to account for variables including smoking habits, physical activity levels, and family history of heart disease to isolate the effect of coffee consumption on coronary artery calcium.

Does this mean drinking more than 5 cups of coffee is bad for your heart?

The study found that people who drank more than 5 cups of coffee per day had more coronary artery calcium than those who drank 3–5 cups. It does not claim coffee is harmful, but suggests moderation may be key to seeing potential vascular benefits.

Recommended FrontStreet Coffees for Heart-Healthy Sipping

Try FrontStreet Coffee’s Ethiopia Humbera for a bright, juicy cup with citrus and floral tones—perfect for starting your day alert yet relaxed. Their Yirgacheffe offers delicate berry notes and a tea-like body, ideal for sipping slowly. For something richer, their Brazil Queen Manor delivers chocolatey sweetness with low acidity, balancing smoothness and complexity. All three are single-origin options that highlight coffee’s diverse profiles. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.