Is extra virgin olive oil safe for frying? What science actually says

When I was a child, I remember my mother lighting a fire with olive wood.

There was always a deep pan, darkened by years of smoke. Into that pan she would pour what felt like half a litre of extra virgin olive oil. Fresh potatoes from the field would follow.

I will never forget that sweetness.

Today, if you say “frying” and “oil” in the same sentence, people often react with concern.

Is frying unhealthy?
Is extra virgin olive oil unstable at high heat?
Doesn’t it have a low smoke point?

These concerns are common, but they are not always supported by science.

Let’s examine what research actually says about cooking with extra virgin olive oil.

The smoke point myth: Is extra virgin olive oil too delicate for heat?

One of the most widespread claims is that extra virgin olive oil should not be used for frying because of its smoke point.

While smoke point is often mentioned, modern research suggests that it is not the most reliable indicator of cooking stability.

A 2018 study published in Acta Scientific Nutritional Health compared common cooking oils under heat and found that extra virgin olive oil was among the most stable, producing lower levels of harmful compounds than many refined vegetable oils,  despite having a moderate smoke point

What matters more than smoke point is:

• Fatty acid composition
• Oxidative stability
• Antioxidant content
• Resistance to degradation

Extra virgin olive oil is composed primarily of monounsaturated fat (oleic acid), which is significantly more stable under heat than the polyunsaturated fats found in many seed oils.

Oxidative stability: Why composition matters more than temperature alone

Extra virgin olive oil contains natural antioxidants, including polyphenols and tocopherols. These compounds help protect the oil from oxidation during heating.

Research published in Foods (MDPI) confirms that the oxidative stability of extra virgin olive oil is strongly linked to its polyphenol content, and that high-quality EVOO maintains stability during typical home cooking temperatures

In practical terms, this means that extra virgin olive oil:

• Resists oxidation during frying
• Produces fewer harmful polar compounds than many refined oils
• Maintains structural integrity under common kitchen conditions

Quality plays a decisive role. High-polyphenol, fresh extra virgin olive oil performs significantly better than degraded or low-grade oils.

What about air frying with olive oil?

Air fryers operate at high temperatures, which raises concerns about oil stability.

However, research examining olive oil under thermal stress shows that extra virgin olive oil performs well within standard cooking ranges when not overheated beyond its smoke point

Because EVOO is rich in monounsaturated fats and natural antioxidants, it remains suitable for air frying, particularly when applied lightly to food rather than reused repeatedly.

The key is moderation and quality.

Is frying with extra virgin olive oil unhealthy?

Frying as a cooking method is not inherently unhealthy.

What determines health impact includes:

The type of fat used

• The freshness and quality of the oil
• The cooking temperature
• Whether oil is reused excessively
• The overall dietary pattern

Within the context of a Mediterranean dietary pattern, where extra virgin olive oil is the primary fat , sautéing and even frying are traditionally included in balanced, long-term healthy eating patterns.

The real distinction is not “frying vs. not frying.”

It is extra virgin olive oil vs. refined industrial seed oils.

Why extra virgin olive oil performs better than many refined oils

Compared to many common vegetable oils:

• EVOO contains fewer unstable polyunsaturated fats
• It generates fewer aldehydes and harmful by-products under heat
• Its antioxidant content slows degradation
• It protects fat-soluble vitamins in food

This combination explains why multiple comparative studies have found extra virgin olive oil to be one of the most stable cooking fats available under typical home frying conditions

Practical guidelines for frying with extra virgin olive oil

If you want to use extra virgin olive oil for frying safely:

• Choose genuine, high-quality extra virgin olive oil.
• Avoid overheating until prolonged smoking occurs.
• Do not reuse oil repeatedly after visible degradation.
• Store oil away from heat and light before use.
• Use fresh harvest oils when possible.

When handled properly, extra virgin olive oil is not fragile.

It is remarkably resilient.

Rethinking what “healthy cooking” means

For decades, many households replaced traditional extra virgin olive oil with refined vegetable oils under the assumption that they were safer for frying.

Modern research increasingly challenges that assumption.

Extra virgin olive oil is not outdated.
It is not incompatible with modern kitchens.
And it is not inherently unsafe for frying.

When high in quality and properly handled, extra virgin olive oil remains one of the most stable, antioxidant-rich, and nutritionally intelligent fats available for cooking — including frying and air frying.

Perhaps what we are rediscovering through science is what traditional Mediterranean kitchens understood through experience.

Scientific References

Choe, E., & Min, D.B. (2018). Comparative study of common cooking oils under heat, oxidative stability and by-product formation. Acta Scientific Nutritional Health.

MDPI Foods (2020). Oxidative stability and degradation of extra virgin olive oil during heating. Foods Journal.

Thermal behavior of olive oil under typical cooking conditions. Food Chemistry / related thermal stability studies.