Is Olive Oil Good for High Triglycerides?

Olive oil can modestly lower fasting triglycerides, but the effect is smaller than many people expect, and other common plant oils actually outperform it for that specific purpose. A meta-analysis of 27 clinical trials found that olive oil reduced triglycerides significantly less than oils richer in polyunsaturated fats. Where olive oil earns its reputation is as part of a broader dietary pattern, and its benefits extend well beyond a single blood-lipid number.

How Olive Oil Compares to Other Oils for Lowering Triglycerides

If your main goal is to push triglyceride numbers down, olive oil is a reasonable choice but not the strongest one in the pantry. A systematic review and meta-analysis of 27 randomized, placebo-controlled trials compared olive oil head-to-head with other plant oils. Olive oil raised HDL (“good”) cholesterol more than the alternatives, but it lowered triglycerides, LDL cholesterol, and total cholesterol less effectively than oils like sunflower, canola, and soybean oil.¹ The triglyceride gap was roughly 4 mg/dL in favor of the polyunsaturated oils. That is not a dramatic difference for any single person, but it matters if you are choosing a cooking oil primarily to address high triglycerides.

One trial that tested three olive oils with varying polyphenol content found that triglyceride levels decreased by about 0.05 mmol/L across all three types, a clinically small reduction.² The polyphenol content did not change the triglyceride result. That is consistent with the broader pattern in the research: olive oil nudges triglycerides in the right direction, but the effect is modest when you isolate the oil itself from everything else that goes with it.

The Mediterranean Diet Does the Heavy Lifting

A network meta-analysis pooling human studies on olive oil’s metabolic effects found something that shifts the conversation. The improvements in triglycerides, blood glucose, and LDL cholesterol seen in olive-oil studies were not driven by the oil on its own. They were mediated through adherence to the Mediterranean diet as a whole.³ In other words, drizzling olive oil on a diet of processed food and refined carbohydrates will not replicate the triglyceride-lowering results seen in clinical trials. Those trials tested olive oil within a dietary pattern that includes vegetables, legumes, fish, nuts, and whole grains, while cutting back on sugar and refined starches.

This makes intuitive sense because triglyceride levels respond powerfully to sugar intake, alcohol, and overall calorie balance. Adding olive oil to your meals changes the fat composition of your diet, which helps, but it cannot single-handedly override a high-sugar or high-alcohol pattern. The people in Mediterranean diet trials who see significant triglyceride drops are making multiple dietary shifts at once. Olive oil is a key piece of that puzzle, but it is not the whole picture.

What Happens to Triglycerides Right After a Meal

Fasting triglycerides, measured after an overnight fast, are only part of the story. Doctors increasingly pay attention to postprandial triglycerides, the spike that occurs in the hours after eating a fat-containing meal. That spike matters because repeatedly elevated postprandial triglycerides are linked to cardiovascular risk independently of fasting levels.

Here, olive oil’s story gets complicated. One long-term dietary intervention found that after weeks on a diet rich in monounsaturated fat from olive oil, subjects actually had higher postprandial triglyceride concentrations in the early hours after a meal compared to a saturated-fat diet.⁴ The researchers interpreted this as a faster rate of dietary fat absorption, not necessarily a worse outcome, since the triglycerides were being processed and cleared rather than sitting in the blood. But the finding undercuts the assumption that olive oil automatically produces a gentler postprandial spike.

A separate study in healthy young men compared single meals containing butter, olive oil, or sunflower oil. The butter meal actually produced a lower postprandial triglyceride rise than either of the two vegetable oils, which performed similarly to each other.⁵ The chylomicron particles (the carriers that ferry dietary fat through your bloodstream) were smaller after the butter meal, which may mean they were cleared from the blood faster. This was a single-meal study in young, healthy individuals, so it does not translate directly into dietary advice. But it illustrates that olive oil is not automatically gentler on your postprandial triglyceride response than saturated fat is, at least not in the short term after one meal.

The postprandial picture improves when you look at triglyceride clearance rather than the initial peak. A study comparing pomace olive oil (which retains certain minor components stripped from more refined versions) to refined olive oil found that the pomace version led to larger triglyceride-rich lipoprotein particles that were cleared from the bloodstream faster.⁶ The takeaway is that what matters is not just how high your triglycerides go after eating, but how quickly your body clears them. And the non-fat components in less refined olive oil seem to help with that clearance process.

Extra Virgin vs. Refined for Triglycerides

People often ask whether extra virgin olive oil (EVOO) is meaningfully better than regular or refined olive oil for cardiovascular markers. For triglycerides specifically, the answer is surprisingly underwhelming. The randomized trial that tested low-, medium-, and high-polyphenol olive oils found similar triglyceride reductions across all three types.² The network meta-analysis reached a similar conclusion: the polyphenols in olive oil contributed mainly to raising HDL cholesterol and improving antioxidant and inflammatory markers, not to lowering triglycerides.³

That said, EVOO does appear to outperform refined olive oil in other areas that matter for heart health. A randomized crossover trial in adults at elevated risk for type 2 diabetes found that high-polyphenol EVOO acutely improved endothelial function (how well blood vessels dilate) compared to refined olive oil, even though blood pressure was not affected.⁷ So if you are choosing between EVOO and refined olive oil, the case for EVOO rests on inflammation, oxidation, and vascular health rather than on a direct triglyceride advantage.

Olive Oil and Liver Fat

When doctors discuss high triglycerides, the liver usually enters the conversation. The liver is the organ that packages and exports triglycerides into the bloodstream. When triglycerides accumulate inside liver cells, the condition is known as non-alcoholic fatty liver disease (NAFLD), which can drive both elevated blood triglycerides and broader metabolic problems.

Olive oil shows genuine promise here. A review of the evidence found that an olive oil-rich diet decreases triglyceride accumulation in the liver, improves postprandial triglyceride handling, and helps with insulin resistance, a key driver of high triglycerides. The proposed mechanisms involve reducing inflammation and improving how liver cells respond to insulin.⁸

Animal research reinforces this. In a rat model designed to produce fatty liver, adding olive oil to the diet blunted the increase in hepatic triglycerides by about 30% compared to the control, and outperformed both fish oil and butter fat for preventing severe fatty liver.⁹ That result in rats does not automatically transfer to humans, but it aligns with the human data showing that monounsaturated fat seems to be gentler on the liver than either saturated fat or certain polyunsaturated fats when it comes to fat storage.

This is worth keeping in mind if your elevated triglycerides are part of a pattern that includes fatty liver or insulin resistance. Even if olive oil does not produce the biggest drop in your fasting triglyceride number, it may be helping at the source by reducing the amount of fat your liver stockpiles and exports.

Pairing Olive Oil with Exercise

Exercise is one of the most effective ways to lower triglycerides, and there is evidence that combining exercise with olive oil consumption amplifies the benefit. A study in healthy young women compared four conditions: olive oil with exercise, olive oil without exercise, butter with exercise, and butter without exercise. The combination of olive oil plus exercise produced the lowest postprandial triglyceride levels, roughly 26% lower than the butter-without-exercise condition.¹⁰

This makes physiological sense. Exercise activates lipoprotein lipase, the enzyme that breaks down triglycerides in the bloodstream. Monounsaturated fats from olive oil are relatively easy for that enzyme to process. So olive oil gives the enzyme a more workable substrate, while exercise revs the enzyme up. Neither works as well in isolation as the two do together.

If you are using olive oil as one part of a triglyceride-lowering strategy, adding moderate exercise before or after your main meals could meaningfully improve how quickly your body clears the dietary fat from your bloodstream.

Your Genetics Might Change the Answer

Not everyone responds the same way to olive oil or to the Mediterranean diet pattern that typically accompanies it. A study in patients with coronary heart disease found that genetic variants in apolipoprotein E (a gene involved in how the body processes fat particles) interacted with long-term Mediterranean diet consumption to change postprandial triglyceride responses.¹¹ Some genotypes showed a better triglyceride response to the Mediterranean diet than others.

This is still early-stage science and not something your doctor would typically test for when recommending olive oil. But it helps explain why some people see a clear triglyceride benefit from switching to olive oil while others see little change. The frustrating reality of lipid metabolism is that it varies quite a bit from person to person, and “olive oil is good for triglycerides” is a statement that applies more strongly to some individuals than to others.

The Gut Microbiome Connection

An emerging area of research looks at how the phenolic compounds in olive oil interact with gut bacteria. Several studies have found that consuming olive oil phenolics increases populations of Bacteroidetes and shifts the ratio of microbial communities in directions associated with protection against atherosclerosis.¹² The bacteria affected by these compounds produce short-chain fatty acids that influence cholesterol metabolism and may play a role in appetite regulation and weight maintenance.

This research is still working out the details of cause and effect. It is not yet clear how large the microbiome-mediated triglyceride benefit is in humans, or whether you need a specific dose of phenolics to see it. But it offers a plausible explanation for why the health benefits of olive oil tend to show up more clearly in long-term dietary studies than in short-term trials. Reshaping your gut bacterial population is not something that happens after a single tablespoon.

Practical Guidance if You Have High Triglycerides

Switching your primary cooking and finishing oil to olive oil is a reasonable move, but it works best as one piece of a larger dietary shift. The evidence is consistent that olive oil within a Mediterranean-style eating pattern lowers triglycerides more than olive oil added to an otherwise unchanged diet. Here are the practical points worth keeping in mind:

Replace, don’t add: If you pour olive oil on top of meals that are already high in calories and refined carbohydrates, you are adding fat calories without addressing the main dietary drivers of high triglycerides. Use olive oil to replace butter, margarine, or other cooking fats.
Sugar and alcohol matter more: For most people with elevated triglycerides, cutting back on added sugar, sugary drinks, and alcohol will produce a larger reduction than switching oils will. Olive oil is complementary to those changes, not a substitute for them.
Grade matters less for triglycerides than you’d think: Extra virgin olive oil has clear advantages for inflammation and vascular health, but the triglyceride-lowering effect is similar across olive oil grades. If budget is a concern, regular olive oil still helps.
Exercise multiplies the benefit: Even modest physical activity around mealtimes improves how quickly your body clears triglycerides, and the combination with olive oil performs better than either alone.
Give it time: The benefits of olive oil for lipid metabolism seem to involve long-term shifts in liver fat handling and gut bacteria, not just an immediate change in blood chemistry. Weeks to months of consistent use is a more realistic timeframe than days.

If your triglycerides are very high (above 500 mg/dL), dietary changes alone are unlikely to bring them into a safe range, and medication is typically needed. Olive oil is not a treatment for severe hypertriglyceridemia. But for the much larger group of people with moderately elevated triglycerides, building meals around olive oil as your primary fat source, within a broader pattern of eating that limits sugar and refined carbs, is one of the more evidence-supported dietary strategies available.