Natural antioxidants could stabilise flaxseed omega-3 encapsulations

By Nathan Gray

- Last updated on GMT

Related tags: Omega-3 fatty acid

Natural polyphenols could be the final part of a solution to bring stability to omega-3 rich flax oils, say researchers.

The vegetarian friendly oil, known for its high content of the alpha-linolenic acid (ALA) has potential uses in enriching foods and beverages with the heart healthy omega-3 fatty acid as a replacement for fish oils. However, as with many sources of omega-3, stability of the oil against oxidation is a problem when used in food formulations.

Writing in the European Journal of Lipid Science and Technology​, the authors of the new study evaluated the effects of incorporating polyphenolic-enriched fractions on the oxidative stability of microencapsulated flax – or linseed – oil, finding that use of the antioxidant acted to further extend the oxidative stability of the encapsulated oils.

The research team, led by Mónica Rubilar from the Universidad de La Frontera, Chile, noted that microencapsulation “is effective in retarding or suppressing the oxidation of unsaturated fatty acids”​ such as flax oil – whilst natural polyphenols from plant extracts could also prove effective in blocking lipid oxidation of microencapsulated oil.

The research team found that the natural polyphenols improved oxidative stability of the encapsulated oils, meaning that the omega-3 rich oils were protected against rancidity.

“The results of this study demonstrated the importance of the addition of natural antioxidants such as fractions of murta leaf extract in microencapsulated flaxseed oil to increase its resistance to oxidation,”​ said Rubilar and her team.

“The use of process technology and a natural additive is expected to increase storage stability and enable its use in dry foods such as instant products,”​ they said.

Flax stability

Flaxseed oil, is a valuable source of omega-3 fatty acid – which generally contains between 52–60% ALA.

“The ALA content is what makes it valuable as an essential component of healthy food,” ​noted Rubilar and her team. “However, the main problem in the quality of oils lies in lipid oxidation during storage or food processing.”

They noted that lipid peroxidation is one of the primary mechanisms of quality deterioration in foods, adding that the oxidation can lead to a reduction in quality and deteriorations in flavour, colour, texture, and nutritive value.

The researchers used an extract of polyphenols from Murta leaves – a wild shrub growing in the Coast and pre-Andean mountains of southern Chile.

“The main objective of this study was to evaluate the effect of the incorporation of polyphenolic-enriched fractions from murta leaf on the oxidative stability of linseed oil microencapsulated by spray drying,”​ explained Rubilar and her colleagues.

As the first part of the study, the researchers performed a chemical characterization of fractions from murta leaf crude extract – separating the components by gel permeation chromatography.

“The oxidative stability of linseed oil microencapsulated by spray drying in storage with and without antioxidant was subsequently evaluated,”​ they said.

Source: European Journal of Lipid Science and Technology
Published online ahead of print, doi: 10.1002/ejlt.201100230
“Polyphenolic fractions improve the oxidative stability of microencapsulated linseed oil”
Authors: M. Rubilar, E. Morales, R. Sáez, F. Acevedo, et al 

Related news

Related products

show more

Get Youthful Skin with DavosLife E3 Tocotrienols

Get Youthful Skin with DavosLife E3 Tocotrienols

KLK OLEO | 06-Jul-2022 | Technical / White Paper

DavosLife E3 Tocotrienols is an extraordinary natural Vitamin E comprising the full spectrum of Tocotrienols and α-Tocopherol. It is a potent bioactive...

KaraHeart™ Showed Results in Just 30 Days

KaraHeart™ Showed Results in Just 30 Days

Karallief® Inc | 30-Jun-2022 | Data Sheet

After extensive R&D, scientists at Karallief® developed KaraHeart™ – a patent-pending and clinically tested vegan herbal blend that effectively manages...

Related suppliers

1 comment


Posted by Jose Cuevas,

To whom it may concern,

Although flaxseed contains some quantity of Omega-3 ALA 18-3. It is very well known and documented that among other anti-nutrients it also contains Linamarin a toxic cyanuglocoside which destroys vitamin B6 in the brain causing apoplexy.

Canadians flaxseed producers helped by Japanese research scientists and a U. Toronto team tried to eliminate Linamarin from Flaxseed oil and succeded but the only problem is that they use chemical solvents whose remainings are still worse than Linamarin as a toxic so it did not proved to be a good solution at all.

Flaxseed which is an industrial oil used to finish furniture is prohibited for human consumption in France and other advanced European Union Countries.


Jose Cuevas
Mexico City

pd. there is a much better source or Omega-3 that contains no toxics at all and has been encapsulated already with high stability: Chiaseed Oil

Report abuse

Follow us


View more