Walk into any well-stocked health food store and you will encounter a row of dark glass bottles with labels advertising "cold-pressed" and "unrefined" oils. These terms have become markers of quality in natural food culture — but not everyone knows precisely what they mean, or why the distinction matters for health. This guide explains what cold pressing actually involves, how it differs from refining, and which cold-pressed oils are worth exploring and for what purposes.
What Does Cold-Pressed Mean?
Cold pressing is a mechanical extraction method in which oil is forced from seeds, nuts, or fruits by applying pressure — without the addition of heat or chemical solvents. In practice, some heat is inevitably generated by the friction of the pressing process, which is why EU regulations define "cold-pressed" as oils produced at temperatures not exceeding 27°C (though many producers maintain temperatures below 40–50°C as a best practice). This low-temperature process preserves the oil's full complement of fatty acids, fat-soluble vitamins, antioxidants, and other heat-sensitive plant compounds that would otherwise be degraded.
By contrast, most mass-market vegetable oils are produced at much higher temperatures — often above 160°C during extraction — and then refined at temperatures approaching 300°C to neutralise colour, odour, and free fatty acids. The result is a stable, neutral-tasting oil with a longer shelf life, but one that has lost the majority of its original nutritional complexity.
Cold-Pressed vs Unrefined: Not the Same Thing
These two terms are frequently used interchangeably in marketing, but they describe different aspects of oil processing and are not synonymous.
Cold-pressed refers to the extraction method — specifically the absence of applied heat during pressing. A cold-pressed oil may still be subsequently refined (bleached, deodorised, filtered) to extend its shelf life and standardise its appearance.
Unrefined (also described as "raw", "crude", or "virgin") refers to oils that have not undergone post-extraction chemical or heat processing. Unrefined oils retain their natural colour, aroma, flavour, and the full spectrum of their bioactive compounds — including vitamins, phytosterols, chlorophylls, and antioxidants.
The most nutritionally complete oils are those that are both cold-pressed and unrefined. These are the products described on labels as "cold-pressed, unrefined" or "cold-pressed, unpurified." They have a shorter shelf life than refined alternatives and must be stored carefully — but they offer substantially more nutritional value per millilitre.
What Cold-Pressed Unrefined Oils Contain
The specific nutritional profile depends on the source plant, but cold-pressed unrefined oils broadly retain:
- Essential fatty acids (EFAs) — particularly omega-3 (ALA) and omega-6 (linoleic acid, GLA in some oils), which the body cannot synthesise itself
- Vitamin E (tocopherols and tocotrienols) — fat-soluble antioxidants that protect cell membranes and contribute to the oil's own stability
- Phytosterols — plant compounds that contribute to maintaining normal blood cholesterol levels
- Carotenoids and chlorophylls — responsible for the characteristic colour of many unrefined oils and providing additional antioxidant activity
- Lignans and other plant polyphenols — varying by source, with documented antioxidant and anti-inflammatory properties
These components are either absent or present in vastly reduced amounts in refined oils. The vitamin E content is particularly relevant — it acts both as a health-supporting nutrient and as the oil's natural preservative, slowing oxidation and extending shelf life in a way that is nutritionally beneficial rather than merely cosmetic.
[tip:Cold-pressed unrefined oils should always be stored in dark glass bottles (not clear plastic) away from heat and light. Refrigeration is recommended for omega-3-rich oils such as linseed and hemp. Once opened, use within 4–6 weeks for maximum freshness and nutritional value. A slightly cloudy appearance in an unrefined oil is completely normal and a positive sign of minimal processing.]A Guide to Key Cold-Pressed Oils and Their Uses
Linseed Oil — The Omega-3 Leader
Cold-pressed linseed (flaxseed) oil contains 50–60% alpha-linolenic acid (ALA) — the highest omega-3 content of any commonly available dietary oil. It is the foundation of the Budwig dietary protocol and supports normal blood cholesterol levels when substituted for saturated fat. Use cold, as a dressing or supplement (1–2 tablespoons per day). Not suitable for heating. Our cooking oils and vinegars collection includes several linseed oil options.
Hemp Oil — Balanced Omega Profile
Cold-pressed hemp seed oil offers a fatty acid ratio considered nutritionally favourable — approximately 1:3 omega-3 to omega-6, with additional GLA. It has a mild, slightly nutty flavour and is well suited to salad dressings, grain dishes, and dips. It is also used topically for dry or reactive skin.
Black Seed Oil — Thymoquinone and Immune Support
Cold-pressed black cumin oil (Nigella sativa) is distinguished by its thymoquinone content — a potent antioxidant and anti-inflammatory compound studied for immune modulation and allergy support. Strong, peppery flavour. Use in small amounts (1–3 teaspoons per day), cold.
Thistle (Milk Thistle) Oil — Liver and Skin
Cold-pressed thistle oil is rich in linoleic acid and plant sterols, with traditionally documented applications for liver support and dry skin care. It has a mild, neutral flavour that integrates easily into dressings and cooked dishes added at the end.
Evening Primrose Oil — GLA for Hormonal Balance
Evening primrose oil is one of the few plant sources of gamma-linolenic acid (GLA), a direct precursor to anti-inflammatory prostaglandins. It is particularly relevant for women managing PMS, menopausal symptoms, and skin conditions such as eczema.
Pumpkin Seed Oil — Zinc-Rich and Deeply Flavoured
Cold-pressed pumpkin seed oil has a distinctive dark green colour, a rich toasted flavour, and a notable zinc and vitamin E content. It is traditionally associated with prostate and urinary tract health in Central European folk medicine. Excellent drizzled over soups, salads, or plain yoghurt — never heated.
Avocado Oil — High Smoke Point (and Cold-Pressed Quality)
Cold-pressed avocado oil is unusual among the oils in this category in that its high oleic acid (omega-9) content gives it a relatively high smoke point — it can be used for gentle cooking as well as raw applications. Its vitamin E and lutein content support skin and eye health.
Sesame Oil — Antioxidant-Rich Eastern Staple
Cold-pressed sesame oil contains sesamol and sesamin — lignans with documented antioxidant activity. It has a characteristic warm, nutty flavour and is a staple in Asian cuisine. It can tolerate moderate heat better than most omega-3-rich oils.
Borage Oil — The Highest GLA Source
Borage oil contains the highest GLA concentration of any commonly available plant oil — typically 20–25%, approximately double that of evening primrose oil. This makes it particularly relevant for skin inflammatory conditions and hormonal regulation, often used in combination with evening primrose for stronger GLA supplementation.
Sea Buckthorn Oil — Concentrated and Carotenoid-Rich
Cold-pressed sea buckthorn berry oil is intensely orange from its high beta-carotene and carotenoid content. It is used in small amounts (a few drops per day) topically or internally, primarily for skin health and mucosal support. Its concentration means a little goes a long way.
Featured Cold-Pressed Oils at Medpak
We carry a broad selection of cold-pressed, unrefined plant oils from trusted European producers — including Olvita, Bilovit, Wellbear, and Skoczylas. Here is a cross-section of our range covering oils described in this article:
[products:olvita-cold-pressed-hemp-oil-unpurified-500-ml, olvita-cold-pressed-pumpkin-seed-oil-unpurified-250-ml, olvita-cold-pressed-avocado-oil-unpurified-250-ml, olvita-cold-pressed-borage-oil-unpurified-250-ml, olvita-cold-pressed-sesame-oil-unpurified-250-ml, olvita-cold-pressed-buckthorn-oil-unpurified-100-ml] [products:bilovit-hemp-oil-cold-pressed-500-ml, bilovit-black-cumin-oil-cold-pressed-500-ml, bilovit-thistle-oil-cold-pressed-500-ml, bilovit-pumpkin-seed-oil-cold-pressed-250-ml, bilovit-sesame-oil-cold-pressed-250-ml, olvita-cold-pressed-grape-seed-oil-unpurified-250-ml]How to Use Cold-Pressed Oils — Practical Rules
The fundamental rule for cold-pressed oils is simple: the more omega-3 an oil contains, the less heat it tolerates. Oils high in polyunsaturated fatty acids — linseed, hemp, black seed, evening primrose, borage — should never be heated, as high temperatures rapidly produce harmful oxidation products and destroy their active compounds. These oils are for cold use only: dressings, finishing drizzles, raw dishes, or taken as supplements.
Oils with a higher proportion of monounsaturated fats (avocado, sesame, camelina, rapeseed) tolerate moderate heat better, though cold-pressed versions are still best used raw or at gentle temperatures to preserve their antioxidants. For high-temperature cooking, refined oils with high smoke points — or solid fats like coconut oil or ghee — are more appropriate.
As a daily routine, incorporating one to two cold-pressed oils into your diet covers a broad nutritional base: a high-ALA oil such as linseed for omega-3, and a GLA-containing oil such as evening primrose or borage for prostaglandin pathway support. Rotating between different oils over time provides variety in fatty acid profiles and phytochemical content.
[note:All products at Medpak are shipped from within the EU, ensuring fast delivery and no customs complications for customers across Europe.]
