Free radical scavenging activity of conjugated linoleic acid as single or mixed isomers.

Context: Conjugated linoleic acids (CLAs) are a mixture of positional and geometric isomers of linoleic acid (LA) and believed to have many positive biological activities.

Objective: The present study was undertaken to assess the antioxidant activity of cis-9, trans-11 and trans-10, cis-12 as single or mixed CLA isomers at two ratios, 1:6 and 1:13 (trans-10, cis-12/cis-9, trans-11).

Materials And Methods: A microplate reader was used to determine the free radical scavenging properties of CLAs against DPPH radical in ethanol.