Reassessment of the antioxidant activity of conjugated linoleic acids

被引：67

作者：

Chen, ZY

Chan, PT

Kwan, KY

Zhang, A

机构：

[1] Department of Biochemistry, Chinese University of Hong Kong, Shatin, New Territories

来源：

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY | 1997年 / 74卷 / 06期

关键词：

conjugated linoleic acids; oxidation; oxygen consumption; prooxidant;

D O I：

10.1007/s11746-997-0213-y

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The anticarcinogenic effect of conjugated linoleic acids (CLA) has been attributed to their antioxidant activity. Strong evidence is lacking, however, to substantiate that CLA is an antioxidant. The objective of this study was, therefore, to test whether CLA is an antioxidant or a prooxidant in canola oil. The oxidation was conducted at 90 degrees C by monitoring oxygen uptake and changes in linoleic acid and alpha-linolenic acid. Free CLA and CLA methyl ester (CLAME) accelerated lipid oxidation in canola oil. The prooxidant activity of CLA and CLAME was dose-dependent at concentrations ranging from 0.1 to 1.0% in canola oil heated at 90 degrees C. CLA-containing triacylglycerol, however, was neither an antioxidant nor a prooxidant. Under the present experimental conditions, CLA was not an antioxidant in fats and oil.

引用

页码：749 / 753

页数：5

共 19 条

[1] THE NATURE OF DIENE CONJUGATION IN HUMAN-SERUM, BILE AND DUODENAL JUICE [J].