Omega 7 Extraction Process Comparison

Omega 7 Extraction Overview

There are three main methods used today to extract oils from fruits and plants: CO2 supercritical extraction, Hexane solvent extraction, and cold press extraction. "Purification" is a new extract method being used to extract Omega 7 from fish sources. Read below for more information on each method.


  CO2 Supercritical Hexane Solvent Cold Pressed "Purification" 
Purity High Medium Low High
Natural High Low High Low
Efficiency High High Low Low
Environmentally Friendly High Low Med Low
Temperature Low High Med High
Oxidation Low High Med Unknown
Nutrient Preservation High Med Low Low

CO2 Supercritical Extraction 

Super critical CO2 extraction is a relatively new method that best delivers the active properties of a plant. This efficient process produces the purest plant extracts possible.

In this process, CO2 in its super critical state is passed through raw plant material. When CO2 is cooled to  30 degrees Celsius and pressurized, it changes from a gas to a super critical state- which is a state between liquid and gas. The CO2 extracts all of the important nutrients as it passes through the plant material.

There is no thermal stress and no solvents are used. CO2 Supercritical extraction is the cleanest, most environmentally friendly and efficient method to extract sea buckthorn oil while best preserving the nutritional profile of the fruit.

  • Advanced technology best protects and preserves the botanical properties of the plant resulting in a very pure extracted oil.

  • Natural – no toxic chemicals used in processing.

  • Low temperature and waste emissions make it extremely environmentally friendly and efficient. More extracted oil equals less wasted raw materials/berries.

  • No high temperatures that can break down nutritional profile of raw materials.

  • No oxygen means no risk of oxidization

  • Very high preservation of nutrients that tends to preserve the genuine aroma of the plant.


SeabuckWonders Uses Supercritical CO2 Extraction

We only use CO2 extraction to create our products. Sea buckthorn has so much nutrition and we want to preserve as much of that as possible for the final oil product. We've noticed an influx of very inexpensive sea buckthorn oil products entering the market. Their extraction methods are questionable at best. 

Learn How to Spot fake Sea Buckthorn Oil 

Hexane Solvent Extraction 

Solvent extraction is a method for processing materials using a solvent to separate the various components within the oil. It is most commonly used with liquids but can also be used for gases and solids. In this method, a solvent (typically Hexane) is introduced to the material and separates its components. The separated components are removed individually to gather the oil. The oil is then cleansed with alcohol to remove the solvents and any other unwanted plant materials such as pigments and waxes released during the process. The alcohol is then evaporated leaving only the extracted oil. Albeit a very common and economical extraction method, hexane solvent is not the cleanest and most environmentally friendly choice. It also uses high temperatures, which may denigrate the nutrients.

  • Extraction method offers a fairly pure extract that is cheap and popular with many fruit extracts.

  • Unnatural method uses gas byproduct to extract oil and is not very pure or clean.

  • Process is efficient and extracts the majority of the fruit oil.

  • Questionable how environmentally friendly this is. Hexane is a toxic and flammable constituent of gasoline.

  • Temperature range is rather high in this method and may damage the nutritional profile of the oil.

  • Oxidisation is high as the extract is evaporated of alcohol leaving it vulnerable to denigration.

  • Nutrient preservation is questionable due to high temperates and exposure to oxygen during the extraction process.

Cold Press Extraction 

For many years cold pressing was the most common way to extract organic oils. It is a simple method where cold pressed oil is obtained through pressing or grinding fruit or seeds with stainless steel presses. There is a little bit of heat produced in the process due to friction that averages at about 40 degrees Celsius. For an oil to be marked as cold pressed the temperated cannot rise above 49 degrees Celsius. In general, cold press is preferable to Hexane solvent extraction because it’s much cleaner and more natural. However, it is not as efficient at extracting high oil content. It does have lower temperatures and oxidation rates, which may better preserve the nutrient profile.

  • Basic manual technology leads to lower purity levels almost akin to juicing as opposed to extracting pure oil.

  • Clean and natural process uses no toxic chemicals.

  • Environmentally friendly but low efficiency leads to high waste.

  • Medium temperature from friction may affect nutrient profile.

  • Oxygen is present in the process and causes the oils to oxidise immediately

  • High oxygen levels and medium temperature may denigrate nutrient profile during extraction.

"Purification"  Extraction 

Today we're seeing Omega 7 being "Purified" from fish oil sources. Contrary to the name, their is very little that's pure about this process. "Purification" uses a 7 step process where Crude fish oil is turned into a standardized 50% Omega 7/Palmitoleic Acid product. The 7-step process being used goes like this: Crude fish oil – deacidification – bleaching – ethyl transesterification – molecular-distillation – fractional-distillation – recrystallization – and packing. There is also high heat during some of these processes which is known to tamper with nutrient quality. Purification a newer industrial process and the information available is scarce.
  • Questionable heavy industrial process

  • High temperatures and heavy processing waste precious other nutrients

  • Temperatures, chemical compounds, and synthesizing likely denigrates nutrient profile during extraction


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