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Lipid peroxidation in culinary oils subjected to thermal stress

Indian Journal of Clinical Biochemistry volume 15, pages 1–5 (2000)Cite this article

Abstract

The levels of cytotoxic aldehydic products in different culinary oils, with or without thermal stress, (routine domestic or commercial frying) were determined by thiobarbituric acid method. The results showed that (i) thiobarbituric acid reactivity was much higher in edible oils rich in polyunsaturated fatty acids than those rich in saturated fatty acids or monounsaturated fatty acids, even without thermal stress, (ii) the lipid peroxide levels were in proportion to the duration of thermal stress, (iii) nature of the container used (steel, iron or teflon-coated) had no significant effect on the extent of lipid peroxidation under identical conditions of thermal stress and (iv) thermally stressed oils collected from hotels and roadside caterers contained higher levels of cytotoxic aldehydic products, when compared to oils thermally stressed under domestic frying conditions. These results suggest that dietary ingestion of thermally or autoxidatively stressed polyunsaturated fatty acid rich culinary oils is more harmful compared with those similarly treated oils rich in saturated fatty acids and monounsaturated fatty acids.

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Authors and Affiliations

  1. Department of Biochemistry, Kasturba Medical College, 575001, Mangalore

    H. Ramachandra Prabhu

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  1. H. Ramachandra Prabhu
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Prabhu, H.R. Lipid peroxidation in culinary oils subjected to thermal stress. Indian J Clin Biochem 15, 1–5 (2000). https://doi.org/10.1007/BF02873539

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  • DOI: https://doi.org/10.1007/BF02873539

Key Words

  • lipid peroxidation
  • thermal stress
  • culinary oils