Cold-pressed, virgin olive or sunflower oil has long been considered to be of high quality. The background to this is the gentle processing during extraction. This ensures that the ingredients, such as the polyunsaturated fatty acids, are retained. Because for cold-pressed oils, the fruits, kernels or seeds of a plant are ground and pressed using a steel press.
But it is a myth that this works without generating any heat. When pressed, friction arises and friction, as is well known, generates heat. Up to 49 ° degrees can arise during the pressing process, so that the oil obtained can still be described as "cold-pressed".This temperature has long been too high for some sensitive ingredients.
CO2 extraction is the gentler way of extracting oil
The CO2 extraction takes place at 30 ° degrees and has therefore proven itself to obtain heat-sensitive plant material. The process actually has to be called supercritical CO2 extraction, a process that was used decades ago to decaffeinate coffee. The colorless and odorless carbon dioxide is compressed under very high pressure, the seed or core bursts, so that the substance to be extracted is detached from the starting material. If the pressure is then reduced, the carbon dioxide releases the dissolved substance - the extract obtained - again.
Therefore, the oils extracted from CO2 are considered to be more fragrant and rich. For example, a direct comparison has shown that the proportion of phytosterols in CO2 extraction is higher than in cold pressing.
Just the ones outPhytosterols obtained from oil-containing plants are what balance the skin's moisture balance and are therefore often used on dry skin. They have an itch-relieving and anti-inflammatory effect.
Why lack of oxygen can be useful
In contrast to cold pressing, no oxygen comes into contact with the plant material to be processed during CO2 extraction. In this way, the sensitive natural substances remain protected from oxidation, are more durable and cannot go rancid as quickly.
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There are many arguments in favor of the oils obtained through CO2 cold extraction. That is why they are the ideal raw material for natural active ingredient cosmetics. Compared to traditional pressing, they are more productive, gentler and antibacterial. The oils obtained achieve a quality that can otherwise only be found in the core of the ripe fruit. This, of course, comes at a price, which is why their use is still rare. But the investment is worthwhile, because even the smallest amounts of these high-quality oils are sufficient to achieve an effect. Not all oils are available in CO2-extracted form. But whenever possible, setanannéCO2 extracts in the products.
In general, CO2 extraction not only protects the raw material but also the environment, as this process does not cause any harmful emissions or water pollution. The carbon dioxide used can be used again and again in an environmentally friendly manner.
Not all oil is created equal
The extraction of vegetable oils does not play an essential role; their molecular property is also important.
Oils that have a small molecular structure penetrate the skin very easily.
This structure makes it possible for a face oil to fulfill the properties of a serum without the addition of water. This is with theanannéThe beerNUTRICIUM und COMFORTthe case. The oils used have small molecules that can penetrate the deeper layers of the skin. Accordingly, the product is well absorbed and does not leave the skin feeling greasy.
@Joachim Mantel: Ja, die CO2 Extraktion kann auch für Lebensmittel angewendet werden. Die Firma Flavex bietet beispielsweise diese Extrakte an.
Das CO2 Verfahren ist beeindruckend.
Kann es auch für Lebensmittelöle angewendet werden.
Kennen sie Firmen, die solche Öle anbieten?