Olive oil is not bad for your heart. It’s one of the most consistently heart-protective foods in nutrition research. People who consume more than half a tablespoon of olive oil per day have a 14% lower risk of cardiovascular disease and an 18% lower risk of coronary heart disease compared to those who don’t use it. The American Heart Association’s 2026 dietary guidance specifically recommends olive oil as part of heart-healthy eating patterns.
That said, the type of olive oil matters, the amount matters, and what you’re replacing with it matters. Here’s what you should know.
How Olive Oil Protects Your Heart
Olive oil is rich in monounsaturated fatty acids, which lower LDL cholesterol (the type that clogs arteries) without reducing the beneficial HDL cholesterol. It also has anti-inflammatory and antioxidant properties that go beyond its fat profile. Chronic, low-grade inflammation in your blood vessels is a driving force behind heart disease, and olive oil works against that process at multiple levels.
The most notable clinical evidence comes from the PREDIMED trial, a large study of people at high cardiovascular risk. Those who followed a Mediterranean diet supplemented with olive oil saw roughly a 30% reduction in cardiovascular events like heart attacks and strokes compared to the control group. That’s a substantial effect for a dietary change.
Extra Virgin vs. Regular Olive Oil
This distinction turns out to be important. A study published in the American Heart Journal (January 2026) followed over 7,000 people at high cardiovascular risk for nearly five years. High intake of extra virgin olive oil (EVOO) was linked to a lower risk of heart problems. Intake of common, refined olive oil was not.
The difference comes down to how the oil is made. Extra virgin olive oil is mechanically pressed from ripe olives, preserving high levels of polyphenols, plant compounds that fight inflammation and prevent LDL cholesterol from oxidizing. Oxidized LDL is particularly dangerous because it triggers the buildup of plaque in artery walls. Regular olive oil is refined using heat and chemicals, which gives it a milder flavor and longer shelf life but destroys most of those polyphenols.
One polyphenol in particular, hydroxytyrosol, has been recognized by the European Food Safety Authority as protective against LDL oxidation. The recommended intake is about 5 mg per day, an amount you can get from a couple of tablespoons of good quality extra virgin olive oil.
Olive Oil vs. Butter and Other Fats
Olive oil’s heart benefits are strongest when it replaces less healthy fats rather than simply being added on top of your existing diet. Swapping just 5 grams per day of margarine for olive oil is associated with a 6% lower risk of cardiovascular disease. Replacing the same amount of dairy fat (like butter) with olive oil is linked to a 5% lower risk.
The AHA’s guidance is clear on the underlying principle: replacing sources of saturated fat with unsaturated fat, especially polyunsaturated and monounsaturated fats, reduces LDL cholesterol. Animal fats like butter and beef tallow are high in saturated fat. Tropical oils like coconut oil and palm oil are too. Olive oil, along with canola and soybean oils, falls on the unsaturated side. So when you cook with olive oil instead of butter, or drizzle it on bread instead of spreading margarine, you’re making a meaningful swap for your cardiovascular system.
Calories Still Count
Olive oil is calorie-dense. One tablespoon contains about 119 calories and 13.5 grams of fat. If you pour it freely over every meal without accounting for the calories, you can easily gain weight, and excess body weight is itself a major cardiovascular risk factor. The goal is to use olive oil as a replacement for other fats in your diet, not as an unlimited addition. Two to three tablespoons per day is a reasonable amount that aligns with Mediterranean diet patterns without creating a calorie surplus for most people.
Cooking With Olive Oil Is Safe
A persistent myth suggests that heating olive oil makes it harmful by breaking down its structure and producing toxic compounds. Research from the University of California, Davis, contradicts this directly. Good quality extra virgin olive oil has excellent heat stability thanks to its natural antioxidants, which resist breakdown during cooking and prevent the formation of harmful compounds. You can sauté, roast, and pan-fry with EVOO at normal cooking temperatures without concern. Deep frying at very high, prolonged temperatures is a different story for any oil, but for everyday home cooking, extra virgin olive oil holds up well.
What Actually Matters
If you’re choosing between olive oil and butter for your morning eggs, olive oil is the better choice for your heart. If you’re choosing between extra virgin and refined olive oil, extra virgin delivers meaningfully more cardiovascular protection. And if you’re wondering how much to use, a couple of tablespoons per day, used in place of other cooking fats, puts you in the range associated with the strongest benefits in research. Olive oil isn’t just “not bad” for your heart. Used consistently as your primary cooking fat, it’s one of the simplest dietary changes you can make to lower your cardiovascular risk.