Refined vs Cold-Pressed Oil: What Food Buyers Should Know

Most of our oils come in more than one grade, usually refined and cold-pressed, and sometimes virgin, roasted or crude as well. The grade changes the oil’s taste, color, smoke point, shelf life and price, so choosing the right one matters as much as choosing the right oil. This guide explains how the grades are made and when to use each.

The definitions

The international Codex Alimentarius standard for fats and oils defines the main grades:

• Cold-pressed oils are obtained by mechanical means only, such as expelling or pressing, without applying heat. They may be purified only by washing with water, settling, filtering and centrifuging.
• Virgin oils are also obtained by mechanical means, such as expelling or pressing, but heat may be applied. They may be purified by the same simple methods only.
• Refined oils go further: after extraction they are refined to remove impurities, color and flavor, giving a clean, neutral oil.

Pressing always generates some heat through friction, so producers of cold-pressed oil control the temperature during pressing. Our cold-pressed sunflower oil, for example, is pressed below 50 °C.

How refining works

Refining is a series of steps, each removing something that would shorten shelf life or affect taste:

1. Degumming removes phospholipids (gums) that cause cloudiness and foaming.
2. Neutralizing removes free fatty acids, which make oil smoke early and taste harsh.
3. Bleaching filters the oil through bleaching earth to remove color pigments and traces of metals.
4. Deodorizing uses steam distillation under vacuum to remove odor and flavor compounds, giving a neutral taste and a high smoke point.
5. Winterizing, for some oils such as sunflower and corn, chills and filters the oil to remove natural waxes, so it stays clear in the cold.

The result is often labeled RBD: refined, bleached and deodorized. Our how we make it page describes the process in more detail.

Refined and cold-pressed compared

	Refined	Cold-pressed
Taste and aroma	Neutral; lets other ingredients come through	Characteristic flavor of the seed, nut or fruit
Color	Light and consistent	Varies with the crop; often deeper
Smoke point	High: about 230 °C (450 °F) for most everyday refined oils	Lower, so better for dressings, finishing and moderate heat
Natural compounds	Some vitamin E and other minor compounds are reduced	Keeps more natural vitamin E, color and flavor compounds
Shelf life, unopened	Longer, often up to 18–24 months	Shorter, often about 9–18 months
Codex limit, acid value	0.6 mg KOH/g max.	4.0 mg KOH/g max.
Codex limit, peroxide value	10 meq/kg max.	15 meq/kg max.
Consistency between lots	Very consistent	Varies more with harvest and origin
Price	Usually lower	Usually higher, as yields are lower

Smoke points and shelf lives vary by oil. Each oil page lists the details for every grade, and the actual results for your lot are on its Certificate of Analysis.

Which grade to choose

Choose refined oil for

• Frying and high-heat cooking, where a high smoke point and long fry life matter.
• Neutral-tasting products such as mayonnaise, baked goods, sauces and snacks, where the oil should not add flavor.
• Consistency at scale, when the same taste, color and performance are needed lot after lot.
• Longer shelf life, for products that sit in warehouses or on shelves for months.

Choose cold-pressed oil for

• Dressings, dips and finishing, where the oil’s own flavor is part of the dish.
• Premium and natural-positioned products, where “cold-pressed” on the label supports the product story.
• Nutritional and specialty products, where keeping the oil’s natural compounds matters, such as flaxseed, hemp seed or black seed oils.

Some oils have other grades too. Roasted oils, such as toasted sesame, roasted peanut and roasted walnut oil, are made from seeds or nuts roasted before pressing for a stronger flavor. Crude oils are unrefined oils supplied to refiners and processors, and are not for direct consumption. Extra virgin olive oil follows its own set of standards, separate from other virgin oils.

Food safety points

• Process contaminants. Refining at high temperatures can form small amounts of 3-MCPD and glycidyl esters. The EU sets maximum levels for these in refined vegetable oils, and refiners control the process to keep them low. Tell us if you are buying for an EU market and we will confirm the relevant results.
• Raw material quality. Because cold-pressed oils are not refined, any contaminant in the seed can stay in the oil, so careful seed cleaning, sorting and testing matter even more. Where a specific risk applies, such as THC in hemp seed oil or PAHs in grapeseed oil, we test every batch for it and report the results on the Certificate of Analysis.
• Allergens. Refining greatly reduces the protein that causes allergic reactions, which is why some countries exempt highly refined oils from certain allergen rules. Cold-pressed and roasted peanut, sesame and tree nut oils can contain allergenic protein, so label them accordingly.

Checking what you receive

Whatever the grade, ask for the specification before ordering and check each delivery against its Certificate of Analysis. The acid value and peroxide value confirm the oil meets the limits for its grade, and the fatty acid composition confirms its identity. Our guide to reading a Certificate of Analysis explains each result, and our guide to cooking oil shelf life lists how long each grade keeps.

When you add an oil to your quote list, choose the grade on the oil’s page. You can order refined and cold-pressed grades of the same or different oils on one quote.

Sources

• Codex General Standard for Fats and Oils: definitions and quality characteristics, FAO
• Codex Standard for Named Vegetable Oils: definitions and quality characteristics, FAO
• Commission Regulation (EU) 2020/1322 on 3-MCPD and glycidyl fatty acid esters
• US FDA: Food Allergen Labeling and Consumer Protection Act (FALCPA)