Refined Olive Oil 7 min read

Refined Olive Oil: What It Is and When to Use It

Refined olive oil — what it is, how it differs from EVOO, why it has no polyphenols, and whether it belongs in your kitchen.

Elena Picual
(Updated )
Clear golden refined olive oil in a transparent glass bottle on a white marble counter
Refined Olive Oil: What It Is and When to Use It

Refined olive oil is the product of chemical refining — the process that removes free fatty acids, flavor compounds, color, and polyphenols from crude olive oil.2. For a complete overview, see our Extra Virgin Olive Oil guide.The result is a neutral-flavored, oxidation-stable oil with no meaningful health benefits. It is a legitimate industrial product with specific culinary uses, but it is fundamentally different from extra virgin olive oil and should not be confused with it.1 2

This guide explains what refined olive oil is, how it is made, why it has no health benefits, and when (if ever) it makes sense to use it.

How Refined Olive Oil Is Made

Refined olive oil is produced through a multi-stage chemical and physical refining process applied to crude olive oil that does not meet virgin grade standards. The process is designed to remove the sensory defects (off-flavors, rancidity, fermentation notes) and high free fatty acid content that disqualify the oil from virgin classification.1 2

The refining process:

  1. Chemical refining: The crude oil is treated with an alkaline solution (typically sodium hydroxide or sodium carbonate) to neutralize free fatty acids. This converts them to soap, which is then separated.
  2. Bleaching: The oil is heated with adsorbent clays (bleaching earth) to remove pigment compounds and oxidation products. This removes the natural green-gold color.
  3. Deodorizing: The bleached oil is steam-stripped at high temperature (180–220°C) under vacuum to remove volatile odor and flavor compounds. This step removes the "olive" smell and taste entirely.
  4. Winterization (sometimes): The oil may be chilled and filtered to remove waxes and high-melting-point fats for clarity at refrigerator temperatures.

The result is a technically pure olive oil with no flavor, no color, and no bioactive compounds. The fatty acid profile is preserved (oleic acid remains the dominant fat), but all of the compounds that make olive oil distinct from any other cooking oil are removed.

What Refined Olive Oil Contains — and What It Does Not

The refining process removes essentially everything that makes olive oil health-supporting:1 3

What refined olive oil has:

  • Oleic acid (monounsaturated fatty acid, MUFA) — approximately 73–83% of the fatty acid profile, identical to EVOO
  • Caloric content identical to EVOO — 884 kcal per 100g
  • Vitamin E (tocopherol) — partially preserved, a minor nutrient

What refined olive oil does not have:

  • Polyphenols — completely removed during deodorizing. Zero hydroxytyrosol, zero oleocanthal, zero oleuropein
  • Oleocanthal — the anti-inflammatory compound responsible for the peppery throat sensation — entirely absent
  • Flavor compounds — all volatile and non-volatile flavor molecules are stripped during deodorizing
  • Antioxidants — the natural antioxidants in EVOO are removed during bleaching and deodorizing

The fatty acid profile (MUFA content) is the one respect in which refined olive oil resembles EVOO. Everything else is gone.

Why Refined Olive Oil Has No EFSA Health Benefits

The EFSA health claim for olive oil (≥ 250 mg/kg hydroxytyrosol derivatives) applies only to olive oils that contain those compounds — i.e., extra virgin olive oil. Refined olive oil does not contain polyphenols, and therefore does not carry the cardiovascular, anti-inflammatory, or neuroprotective benefits documented for EVOO.3

This is not a minor distinction — it is the difference between using olive oil as a functional food and using it as a neutral cooking medium. The cardiovascular benefits documented in the PREDIMED study and dozens of clinical trials were achieved with high-polyphenol EVOO, not refined olive oil.

The health claim applies to: Extra virgin olive oil with ≥ 250 mg/kg hydroxytyrosol derivatives The health claim does not apply to: Refined olive oil, olive oil blends, "pure" olive oil, "light" olive oil

When to Use Refined Olive Oil

Refined olive oil has legitimate culinary uses — primarily as a neutral cooking fat when the flavor of EVOO would be inappropriate:1 2

Appropriate uses for refined olive oil:

  • Baking where a neutral-flavor fat is needed (some pastries, cakes, cookies where the baker prefers no olive oil flavor)
  • Deep-frying for very high-heat applications where the smoke point advantage (230–240°C vs 190–215°C for EVOO) matters
  • When someone dislikes the flavor of olive oil but wants to use olive oil for its MUFA content
  • Industrial food production where EVOO flavor would be inconsistent or inappropriate for the product

Situations where refined olive oil is NOT the best choice:

  • Any application where health benefits are the goal — EVOO delivers them, refined does not
  • Finishing or raw use — refined oil has no flavor to contribute and no health benefit
  • Mediterranean cuisine where olive oil flavor is part of the dish identity
  • Salad dressings, dips, or any application where the oil is tasted directly

The honest assessment: If you are going to the trouble of using olive oil (higher cost, more distinct flavor) you might as well use EVOO. The small smoke point advantage of refined oil does not justify losing all the polyphenols and flavor.

Labels to Understand

The following label terms indicate refined olive oil:1

  • "Pure Olive Oil" — This is refined olive oil. The "pure" label is marketing, not a quality claim.
  • "Light Olive Oil" — Refined olive oil with a light flavor. "Light" refers to flavor and color, not calories or fat content.
  • "Olive Oil" (without "Extra Virgin") — Often a blend of refined and virgin oils, or fully refined
  • "Pomace Olive Oil" — The lowest grade; solvent-extracted from olive pomace, always refined

The only label that carries documented health benefits is "Extra Virgin Olive Oil" with a recent Harvest date and published polyphenol content.

Frequently Asked Questions

What is the difference between extra virgin and refined olive oil?

Extra virgin olive oil is mechanically extracted from olives without chemical refining — it retains all of its natural polyphenols (including hydroxytyrosol, oleocanthal, and oleuropein), flavor compounds, color, and antioxidants. Refined olive oil is produced by chemically bleaching, deodorizing, and neutralizing crude olive oil — removing all polyphenols, flavor, and color while preserving only the fatty acid profile. The difference in health impact is fundamental: EVOO has documented cardiovascular, anti-inflammatory, and neuroprotective benefits driven by its polyphenol content; refined olive oil has none of these benefits. The only thing they share is the MUFA (oleic acid) content. For cooking applications where the flavor of EVOO is undesired, a neutral seed oil like high-oleic sunflower may be preferable to refined olive oil.1 3

Is refined olive oil bad for you?

Refined olive oil is not "bad" in the sense that it is toxic or dangerous — it is a neutral cooking fat with a similar fatty acid profile to EVOO. It is "bad" in the sense that it delivers none of the health benefits that make olive oil worth using over other neutral fats. If you are going to cook with fat and pay the premium price for olive oil, you are wasting your money if you buy refined. Use EVOO for its documented benefits, or use a cheaper neutral fat if you specifically need neutral flavor. The polyphenol content is not a trivial component — it is the primary mechanism by which olive oil improves health outcomes.1 3

Why does refined olive oil have a higher smoke point?

Refined olive oil has a higher smoke point (230–240°C) than EVOO (190–215°C) because the refining process removes the free fatty acids and volatile compounds that cause early smoking. However, the smoke point advantage is partially offset by the fact that refined oil has no polyphenol antioxidants — polyphenols are natural antioxidants that slow oxidation during cooking. In practice, the functional smoke point advantage for home cooking is minimal: most sautéing (120–170°C) and pan-frying (165–185°C) is well within EVOO's range, and even high-heat pan-frying rarely exceeds 200°C in a home kitchen. For deep-frying at 175–190°C, a high-polyphenol EVOO may actually perform better due to its antioxidant content.1 2

Can I substitute refined olive oil for extra virgin in recipes?

You can substitute refined for extra virgin, but you should not expect the same results. The flavor will be neutral (no olive notes), the health benefits will be eliminated, and the smoke point will be slightly higher. Whether this substitution makes sense depends on the recipe: for baking or cooking where neutral flavor is desired, refined is acceptable; for any dish where olive oil flavor is part of the identity (Mediterranean cooking, sautéed vegetables, finishing dishes), EVOO is clearly superior. A blanket substitution of refined for EVOO across all cooking is not recommended — it sacrifices all health benefits for a marginal smoke point gain.1

References

1. Olive Oil Source. "Olive Oil Classification and Standards." https://www.oliveoilsource.com/info/olive-classification

2. International Olive Council. "Chemistry and Olive Oil Standards." https://www.internationaloliveoil.org/what-we-do/chemistry/

3. EFSA Panel

4. Gutierrez-Mariscal FM et al. "Evidence for the Benefits of Olive Oil in Human Health." Frontiers in Nutrition. 2022. on Dietetic Products. "Scientific Opinion on health claims related to olive oil polyphenols." EFSA Journal. 2011.