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ARS Home » Midwest Area » Peoria, Illinois » National Center for Agricultural Utilization Research » Functional Foods Research » Research » Publications at this Location » Publication #310705

Title: Antioxidant activity of sesamol and omega-oryzanol towards fish oil

item Fhaner, Matthew
item Hwang, Hong-Sik
item Moser, Jill
item Bakota, Erica
item Liu, Sean

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 5/3/2015
Publication Date: 5/6/2015
Citation: Fhaner, M.J., Hwang, H., Winkler-Moser, J.K., Bakota, E.L., Liu, S.X. 2015. Antioxidant activity of sesamol and omega-oryzanol towards fish oil [abstract]. American Oil Chemists' Society.

Interpretive Summary:

Technical Abstract: Two natural antioxidants, sesamol and omega-oryzanol, were examined for their antioxidant activity towards omega-3 oil. Sesamol and omega-oryzanol have been known to provide antioxidant effects at high temperatures such as those used for frying. In this study, the effects of 0.84 mM and 8.4 mM oryzanol and sesamol in stripped fish oil at 30° and 50° C were examined and compared with butylated hydroxytoluene (BHT) and a commercial rosemary extract. Overall, omega-oryzanol did not show an impressive antioxidant effect while sesamol on the other hand produced strong antioxidant activity towards the stripped fish oil. At 0.84 mM, the order of antioxidant effectiveness in reducing the peroxide value was rosemary extract > sesamol > BHT > omega-oryzanol. However, at the higher concentration, 8.4 mM, the order of antioxidant effectiveness was sesamol > rosemary extract > BHT > omega-oryzanol. Conjugated diene values, head space volatiles, and fatty acid profiles including EPA and DHA were also investigated with a similarly produced trend in antioxidant behavior as found for the peroxide value studies. With all data considered, it was determined that sesamol was better than the commercial rosemary extract at the higher concentration (8.4 mM). Considering some shortcomings of rosemary extract such as low solubility in oil and unique flavor, sesamol provides an effective natural antioxidant alternative to rosemary extract.