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Oxidative stability of sesame and flaxseed oils and their effects on morphometric and biochemical parameters in an animal model
Author(s) -
Figueiredo Priscila S,
Candido Camila J,
Jaques Jeandre AS,
Nunes Ângela A,
Caires Anderson RL,
Michels Flavio Santana,
Almeida Jeeser A,
Filiú Wander FO,
Hiane Priscila A,
Nascimento Valter A,
Franco Octavio L,
Guimarães Rita CA
Publication year - 2017
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8186
Subject(s) - polyunsaturated fatty acid , food science , sesame oil , chemistry , animal fat , sesamum , linseed oil , sesame seed , fatty acid , biology , biochemistry , agronomy , raw material , organic chemistry
BACKGROUND Sesame and flaxseed oils, which are rich in essential n ‐6 and n ‐3 polyunsaturated fatty acids, are widely consumed. We have determined the optical behavior with respect to the quality and identity of cold‐pressed sesame and flaxseed oils. The effects of these oils and their combinations on metabolic parameters in animal models were also measured. RESULTS Flaxseed oil emitted carotenoid fluorescence (500–650 nm), although it was more unstable than sesame oil, which had a larger induction period by the Rancimat method. The greater stability of sesame may be a result of the lower quantity of linolenic fatty acids. These oils were added to the feed of 56 rats, whereas animal fat was used for the control group. The sesame oil, flaxseed oil and sesame + flaxseed oils groups showed a significantly reduced adiposity index and blood glucose compared to the control group, whereas total cholesterol, high‐density lipoprotein and triglycerides were lower in flaxseed oil and sesame + flaxseed oils ( P < 0.05). Sesame + flaxseed oils had reduced levels of low‐density lipoprotein and non‐high‐density lipoprotein ( P < 0.05), indicating an anti‐atherogenic effect in this group. CONCLUSION Sesame oil was more stable than flaxseed oil. In an animal model, the diets with polyunsaturated fat sources proportions of 1:1 n ‐6: n ‐3 polyunsaturated fatty acids, improved the metabolic parameters, implying cardioprotective effects. © 2016 Society of Chemical Industry