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Vegetable oils are a key component of the modern diet. The most common are sunflower, corn, and olive oil, which are widely available on the shelves of grocery stores and supermarkets. Most of them are refined and deodorized fats, which are far from beneficial to your health.
Even unrefined oils sold in stores have little nutritional value. They are typically produced using industrial screw presses and go through aggressive purification processes like winterization and treatment with adsorbents.
Large-scale manufacturers of sunflower, corn, and other vegetable oils rarely speak about the health risks of their products. However, once aware of their negative impact on the body, many consumers choose to replace them with raw, cold-pressed oils.
Why refined oil is harmful and how it affects your immune system
In industrial production, oils are extracted using high-powered screw presses that heat up to 100°C (212°F) or higher. This happens due to the friction of seeds against the metal surface inside the press. At such temperatures, complex chemical changes occur, breaking down fat-soluble vitamins — especially vitamin A and vitamin E — which are essential for a strong immune system.
Heat treatment also disrupts the natural fatty acid balance in the oil, particularly destroying valuable omega-3 fatty acids. When oils are high in omega-6 but almost void of omega-3s, they fuel inflammatory processes in the body, damaging tissues and organs at the cellular level.
Another danger in refined oil is the presence of benzo(a)pyrene residues — a highly toxic carcinogen. Medical studies link this compound to cancer development. It often contaminates oils when sunflower seeds are dried using diesel fuel in violation of safety standards.
Additionally, the refining process can lead to the formation of trans fats — artificial compounds that are considered a major cause of autoimmune diseases, many of which are currently incurable.
Regular consumption of refined, deodorized oils puts extra strain on the liver, which is responsible for filtering toxins. As a result, it becomes less effective at performing other critical functions, including immune support.
The hidden danger of solvent-extracted oils
Another serious concern is oils produced by solvent extraction. This method involves using chemical reagents to extract leftover oil from seedcake after mechanical pressing.
These oils lack any vitamins or beneficial fatty acids and instead contain residues of artificial fat-releasing agents. Moreover, the remaining seedcake is reheated during this process. Reheating dramatically increases carcinogen concentration, turning the oil into a toxicological trigger that activates inflammation, organ damage, and cellular degradation in the body.
Raw cold-pressed oils: the healthier alternative
The best and only truly healthy alternative to refined oils are raw, cold-pressed oils. These oils are produced without heat or chemical exposure, and they do not come into contact with metals or reactive compounds. They also resist oxidation in air.
Cold-pressed oils retain all the vitamins, minerals, fatty acids, and bioactive compounds found in the original seeds or nuts.
One trusted brand offering premium, aromatic, and highly nutritious craft oils is CraftOil. Their regularly updated catalog includes sweet poppy seed oil, spicy mustard oil, rich and piquant black cumin seed oil, as well as oils from walnut and hazelnut kernels. The site also features a great selection of seeds, nuts, and flours — 100% natural products that can enrich your diet and improve both your health and appearance.
To learn more, simply fill out the request form on the website or contact the CraftOil team using any convenient method.
Maria
I have switched to cold pressed oils and gave up refined oils a long time ago, because they are the only ones that retain all their beneficial properties and improve health.