Abstract
The objective of the study was to investigate the application of flaxseed oil cake extract (FOCE) for oxidative stabilization of flaxseed oil in spray-dried emulsions. Two variants of powders with 10% and 20% of flaxseed oil (FO), FOCE, and wall material (maltodextrin and starch Capsul®) were produced by spray-drying process at 180 °C. The oxidative stability of FO was monitored during four weeks of storage at 4 °C by peroxide value (PV) and thiobarbituric acid-reactive substances (TBARS) measurements. Additionally, the fatty acids content (especially changes in α-linolenic acid content), radical scavenging activity, total polyphenolics content, color changes and free amino acids content were evaluated. Obtained results indicated that FOCE could be an adequate antioxidant dedicated for spray-dried emulsions, especially with a high content of FO (20%). These results have important implications for the flaxseed oil encapsulation with natural antioxidant agents obtained from plant-based agro-industrial by product, meeting the goals of circular economy and the idea of zero waste.
Highlights
The cultivation and use of flaxseed (Linum usitatissimum L.) and its oil have been reported since antiquity [1]
flaxseed oil cake extract (FOCE) powders were observed in a previous study
The obtained results are higher than reported by Vélez-Erazo et al for spray-dried vegetable oil emulsions stabilized by whey protein concentrate (WPC) and WPC-pectin systems [13]
Summary
The cultivation and use of flaxseed (Linum usitatissimum L.) and its oil have been reported since antiquity [1]. In recent years, interest in flaxseed oil has rapidly grown due to the awareness of consumers about healthy eating and a balanced diet. Flaxseed oil is used for industrial purposes, such as the production of paints, linoleum, varnishes, inks, and cosmetics. It is used in food and pharmaceutical industries [1,2]. Unlike fish oil, does not contain EPA (eicosapentaenoic acid) or DHA (docosahexaenoic acid), it is still gaining the attention of consumers who are interested in a healthy diet [3]. Flaxseed oil (having cardioprotective and antiatherogenic activity) is appreciated by consumers due to the composition of fatty acids—
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