síbiotech specializes in the extraction of bioactive compounds using innovative, sustainable and environmentally friendly technology – supercritical fluid extraction with carbon dioxide (CO₂). Extracts are obtained from natural raw materials such as berries, fruits, and medicinal plants, as well as from their processing by-products, for example, sea buckthorn seeds, hemp seeds, linseeds.

Both non-polar or fat-soluble fractions and polar compounds are obtained from the mentioned raw materials. For polar compounds, a secondary solvent such as ethanol is additionally used in the supercritical fluid extraction process. Carbon dioxide (CO₂) and ethanol are recognized as safe and harmless solvents (GRAS – Generally Recognized As Safe).

In supercritical fluid extraction technology, carbon dioxide (CO₂) is exposed to pressure (74bar) and temperature (31°C) above its critical limits. Under the influence of this process, CO₂ changes its physicochemical properties, entering a supercritical state and acquiring effective solvent properties. By circulating through the raw material in a certain amount and flow rate, supercritical CO₂ (scCO₂) extracts fat-soluble bioactive compounds like fatty acids, fat soluble vitamins, plant sterols and other bioactive compounds. In the course of extraction, the scCO₂ saturated with compounds of the raw material is led to separators, where the pressure is reduced accordingly, scCO₂ returns to a gaseous state, and target substances are obtained in the separators. In addition, it is possible to obtain polar compounds of raw material (for example, polyphenols) by using a secondary solvent in the extraction process. The CO₂ released in the separators is collected and used for subsequent extraction cycles. The obtained extracts do not contain CO₂ residues, they are of high concentration, quality and microbiologically stable with a long shelf life. The technology is sustainable and environmentally friendly and does not use organic solvents.

Advantages of the technology
• Efficient extraction of bioactive compounds.
• 100% pure extracts with no additives.
• Bioactive compounds are not modified, their natural chemical form is preserved.
• Gentle extraction method, preserving the nutraceutical activity of bioactive compounds.
• No contact with oxygen – no oxidation takes place.
• CO₂ is recycled and collected – environmentally-friendly.
• Highly concentrated extracts (effective in small doses).
• Extracts are microbiologically stable and have a long shelf life.
• Extracts do not contain heavy metals, inorganic salts, proteins, fiber, or allergens.
• Extracts do not contain solvent residues.