• How is flaxseed oil extracted?
  • This work compares the yield and quality of the flaxseed oil obtained by individually optimized supercritical carbon dioxide extraction (SCE), three-phase partitioning (TPP), solvent extraction and the reported values of cold press extraction.
  • How does the demand for flaxseed oil affect the extraction process?
  • The increasing demand for flaxseed oil did not only increase the activity level of flaxseed oil extraction but also increased the amounts of the by-products generated (e.g. flaxseed cake/meal) from the extraction process. Flaxseed oil is extracted by applying pressure on the whole flaxseed, i.e. oil pressing, with or without heating.
  • Where did flaxseed come from?
  • Historically, flaxseed has been consumed as an edible grain in Europe and Asia since 5000¨C8000 B.C. ( Carter, 1993 ). Flaxseed is valued for its oil content, which traditionally was used for paints and coatings, printing inks, soap, core oils, brake linings, and herbicide adjuvant ( Carter, 1993 ).
  • Which extraction method gives the highest yield of oil from flaxseed?
  • Solvent extraction gave the highest oil yield. Oil extracted by SCE showed the best quality in terms of unsaturation and antioxidant activity. Enzymatic pre-treated TPP is a promising approach for extraction of oil from flaxseed as it simultaneously separates protein and oil.
  • Can flaxseed oil be used in food industry?
  • Besides, different proportions of anhydrous butterfat, palm stearin, and flaxseed oil were also used to prepare low-trans spreadable fat with functions such as a-linolenic acid (Shin, Akoh, & Lee, 2010). 8. Conclusion and future perspectives As mentioned above, flaxseed oil can be widely used in food industry.
  • Can Ultrasound-assisted extraction increase the yield of flaxseed oil?
  • In contrast, ultrasound-assisted extraction is more suitable for large-scale production and has better development and application potential, it could significantly increase the yield of flaxseed oil by 11.5%, and the extraction rate of PUFAs by 68.12% (Ranveer, Gutte, & Sahoo, 2015; Long et al., 2011).