Cold-Pressed vs Expeller-Pressed: What Those Labels Actually Mean

Cold-pressed vs expeller-pressed is one of the most common label questions in the carrier-oil aisle. Both describe mechanical ways of getting oil out of seeds and nuts, and the difference mostly comes down to heat. Here's what each label really means, how the oils compare, and how steam distillation fits in for essential oils.

Quick answer: Expeller pressing squeezes oil from seeds or nuts with a mechanical screw press, and friction can push temperatures well above 120°F. Cold pressing uses the same kind of press but keeps temperatures low, commonly cited as below about 120°F (49°C), though there's no single regulated US definition. Neither method relies on chemical solvents like hexane. Steam distillation is a different process used for most essential oils, while citrus essential oils are usually cold-pressed from the peel.

Expeller-Pressed: Mechanical and Efficient

An expeller is a screw press that crushes and squeezes seeds as they move through a barrel. Pressure and friction create heat, sometimes a lot of it. The process is efficient, solvent-free and widely used, producing consistent oils that are often lightly filtered or refined afterward for a clear look and mild scent.

Expeller pressing is the workhorse of the oil world because it handles large volumes and a wide range of seeds and nuts. For shoppers, the main thing to know is that it's a purely mechanical method. Expeller-pressed doesn't mean low quality; it simply means the press ran warmer and faster than a cold-press setup.

Cold-Pressed: Same Idea, Lower Temperature

Cold-pressed oils go through a similar press, but the operation is slowed or cooled so temperatures stay low. People often choose cold-pressed oils because they tend to keep more of the seed's natural color and aroma: cold-pressed sunflower looks more golden, cold-pressed avocado can be greener, and cold-pressed castor oil looks clear and pale with a very mild scent. Yields are lower, which is one reason cold-pressed oils can be harder to find.

Because there's no single legal standard for the term in the US, "cold-pressed" works best as a description from the producer rather than a guarantee of a specific temperature. A brand that explains its process clearly is a good sign.

Cold-Pressed Castor Oil: What Shoppers Ask

Castor oil is where these labels come up most. Our Organic Castor Oil in Glass Bottle is cold-pressed, while our Organic Castor Carrier Oil is expeller-pressed. Both are organic and solvent-free; the difference is the pressing temperature and the format. When comparing organic cold-pressed castor oils, check for:

• A recognized organic seal
• The pressing method stated on the label
• Hexane-free or solvent-free wording
• A single ingredient and a clear, pale color

For a full rundown, see our guide to organic castor oil basics.

Steam Distilled vs Cold Pressed Essential Oils

Essential oils use different methods. Most, like Lavender Essential Oil, peppermint and eucalyptus, are steam-distilled: steam passes through plant material, carries the aromatic compounds out, and they're separated as the steam cools. Citrus oils such as Lemon Essential Oil are usually cold-pressed from the peel instead, which keeps their just-zested brightness. Our visual guide to steam-distilled vs cold-pressed oils shows both side by side. As a rule of thumb, if an essential oil comes from a citrus peel, expect cold pressing; if it comes from leaves, flowers, wood or resin, expect steam distillation.

Frequently Asked Questions

Is cold-pressed better than expeller-pressed?

Not automatically. Cold-pressed oils tend to keep more natural color and aroma, while expeller-pressed oils are consistent and widely available. Choose based on what matters to you.

Can an expeller-pressed oil be organic?

Yes. Organic refers to how the plant was grown and handled, while expeller-pressed or cold-pressed describes how the oil was extracted. An oil can be both.

What does refined mean on an oil label?

Refined oils are further filtered or processed after pressing to lighten color and scent. Unrefined oils are simply filtered, so they keep more of the seed's natural character.

Once you know these labels describe heat and process, not a quality ranking, shopping gets much simpler. Pick the method and format that fit your routine and how natural you want the color and scent to be.

Essential oils are highly potent. Always dilute them in a carrier oil before they touch skin, patch test first, keep them away from eyes, and never ingest them.