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Antioxidant properties of annatto carotenoids

Kiokias, S. and Gordon, M.H. (2003) Antioxidant properties of annatto carotenoids. Food Chemistry, 83 (4). pp. 523-529. ISSN 0308-8146

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To link to this item DOI: 10.1016/s0308-8146(03)00148-1

Abstract/Summary

The antioxidant effects of beta-carotene, oil-soluble (bixin) and water-soluble (norbixin) annatto preparations and mixtures of these carotenoids with virgin olive oil polar extract were assessed in bulk olive oil and oil-in-water emulsions stored at 60degreesC. Norbixin was the only carotenoid that inhibited the oxidative deterioration of lipids in both systems. Though bixin and beta-carotene did not retard autoxidation, their mixtures with the polar extract from virgin olive oil enhanced the antioxidant effect of the olive oil extract. Norbixin (2 mM) was of similar activity to delta-tocopherol (0.1 mM) in stored oil. The combination of norbixin with ascorbic acid or ascorbyl palmitate in oil showed a reduction in formation of volatile oxidation products but not in peroxide value, compared with the analogous sample lacking norbixin. In olive oil-in-water emulsions, norbixin (2 mM) reduced hydroperoxide formation to a similar extent as delta-tocopherol (0.1 mM), which in turn was a better antioxidant than alpha-tocopherol. A synergistic effect between norbixin and ascorbic acid or ascorbyl palmitate was observed in the emulsion systems. (C) 2003 Elsevier Ltd. All rights reserved.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences
ID Code:13252
Uncontrolled Keywords:norbixin, antioxidant, olive-oil, emulsions, oxidation, VIRGIN OLIVE OIL, BETA-CAROTENE, ALPHA-TOCOPHEROL, OXIDATIVE STABILITY, GAMMA-TOCOPHEROL, SOYBEAN OIL, VITAMIN-E, POLYPHENOLS, COMPONENTS, EMULSIONS

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