Polyphenol Rich Olive Oil: What It Is and Why It Matters

Polyphenol rich olive oil is extra virgin olive oil with a high level of polyphenols. Polyphenols are a type of antioxidant that occur naturally in olives. Most high-quality extra virgin olive oils are polyphenol rich. Some, like the EXAU Lina, have especially high levels.

In this guide, we cover:

• What polyphenols are
• Why they matter
• How to taste them
• How to shop for a high-polyphenol oil

What Are Polyphenols?

Polyphenols are natural antioxidants found in plants. You can find them in fruits, vegetables, coffee, tea, wine, and olives. More than 8,000 types have been identified. They are the largest group of chemical compounds in the plant kingdom.

Antioxidants protect the body from free radicals. Free radicals damage cells. Over time, that damage is linked to serious diseases. These include cancer, heart disease, and Alzheimer's.

Cancer.gov describes polyphenols as plant substances that give some flowers, fruits, and vegetables their color. They also have antioxidant activity. Research on PubMed confirms they are potent antioxidants and may also have anti-inflammatory properties.

Why Polyphenols Matter in Olive Oil

Polyphenol levels matter for two reasons. First, they drive the health benefits that make extra virgin olive oil so valuable. Second, they give farmers and producers a way to measure quality.

For producers, polyphenol data shows what is working in the grove. It helps identify what needs to change. Every measurable result has value. Without these numbers, it would be very hard to improve from one harvest to the next.

For consumers, polyphenol levels are a useful quality signal. A high count generally means healthy trees, careful harvesting, and good milling.

Health Benefits of Polyphenol Rich Olive Oil

Olive oil is one of the most studied foods on the planet. Researchers keep finding new benefits. Here is what we know so far:

• Antioxidant protection against cell damage
• Anti-inflammatory effects
• Antibacterial and antiviral properties
• Potential anticancer effects
• Lower risk of heart disease
• Better cholesterol levels (more HDL, less LDL)
• Less oxidative stress
• Support for healthy weight and blood sugar
• Stronger bones
• Lower risk of brain diseases like Alzheimer's

Regular use has also been shown to lower blood pressure. It reduces triglycerides. It also stops LDL cholesterol from sticking to artery walls.

The FDA allows the following health claim for oils high in oleic acid: daily use of about 1.5 tablespoons, when replacing saturated fats, may reduce the risk of heart disease. The evidence is supportive but not yet conclusive.

Most olive oil research is done by universities and private groups. We hope to see more involvement from the FDA on extra virgin olive oil specifically.

Here are some resources for further reading:

• Polyphenols in Olive Oil and Food Safety — Olive Oil Times
• Oleacin and Neuroinflammation — Olive Oil Times
• Polyphenols and Cognitive Impairment — Olive Oil Times
• Oleocanthal and Cancer Prevention — Olive Oil Times
• Polyphenols and Heart Health — PubMed

Can You Taste Polyphenols?

Yes. Polyphenols have a clear taste. When you try a high-polyphenol olive oil, you will notice bitterness on the tongue. You will also feel a peppery, tingly burn at the back of the throat. Sometimes it makes you cough. That is a good sign.

Two specific compounds cause these sensations. Oleocanthal causes the throat burn. Oleuropein causes the bitterness. More of these compounds means a higher polyphenol level.

Tasting is a great first clue. But a lab test is the only way to get an exact number. Learn how to do an olive oil tasting at home.

How to Test for Polyphenols

The most accurate method is lab testing. A certified lab can run a full certificate of analysis (COA). It can also test just for polyphenol content.

EXAU exclusively produces premium Italian extra virgin olive oil. We use regenerative farming methods and work with olive agronomists. Both of these practices support higher polyphenol levels in the final oil.

Do Polyphenols Decrease Over Time?

Yes. Polyphenol levels drop as olive oil ages. This is why the harvest date matters more than the best-by date. However, this is also why we filter. Filtering stabilizes an oil and, therefore, maintains the health benefits of an oil.

Does Filtering Help Stabilize Antioxidant Levels?

Yes. Filtering helps maintain the antioxidant levels within an olive oil. This is why you should only buy an extra virgin olive oil where the producer clearly states the product has been filtered. At EXAU, we always filter our oils. This makes them more shelf stable.

As a best practice, consume extra virgin olive oil within 24 months of the harvest date. Store it in a cool, dark place. Keep it away from heat, light, and air. All three speed up polyphenol loss.

Should You Obsess Over Polyphenol Counts?

Not for everyday use, especially if you are using a premium extra virgin olive oil like EXAU. Oils like ours are naturally polyphenol rich and we take steps to protect that. If you buy true EVOO from a good producer, the polyphenol content will already be solid.

Premium EVOO is made with early-harvest green olives. Green olives have the highest polyphenol levels. As olives ripen and darken, those levels drop. Producers who harvest early give up yield to protect quality.

At EXAU, we harvest a mix of green and purple olives. Healthy trees and careful milling do the rest.

The best approach is simple. Find a few high-quality oils you enjoy. Rotate through them. Buy from honest producers like EXAU.

Related: How Extra Virgin Olive Oil Is Made

Frequently Asked Questions About Polyphenols in Olive Oil

What is a good polyphenol level for olive oil?

Oils above 250 mg/kg are generally considered high-polyphenol. Many premium extra virgin olive oils fall between 200 and 500 mg/kg. Early-harvest oils from healthy groves often exceed that range. At EXAU, ours typically land around 800 mg/kg, making us an outlier.

Does cooking destroy polyphenols in olive oil?

Some are lost during cooking. But extra virgin olive oil keeps a good amount of its antioxidants even when used for sautéing or roasting. For the most benefit, use EVOO raw as a finishing oil or in dressings. Read more about cooking with extra virgin olive oil.

Which olive oil has the most polyphenols?

Early-harvest extra virgin olive oils from green olives tend to have the highest levels. Some cultivars, like Coratina, are known for very high polyphenol content. Always look for a harvest date and lab results when shopping.

Is polyphenol rich olive oil better for you?

Generally, yes. More polyphenols means more antioxidant and anti-inflammatory activity. But the biggest health gap is between true EVOO and refined oils, not between high and moderate polyphenol EVOO. Any genuine extra virgin olive oil is a strong choice.

Shop our premium Italian extra virgin olive oil, single origin and family farmed since 1927.

We wrote a book called The Olive Oil Enthusiast. Order your copy today.

You may also like:

What Is Extra Virgin Olive Oil?

Olive Oil Acidity Explained

How Extra Virgin Olive Oil Is Made

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