(±)11-HETE is one of the six monohydroxy fatty acids produced by the non-enzymatic oxidation of arachidonic acid . The individual R and S isomers of racemic HETEs have been separated and identified using chiral phase HPLC. The racemic HETEs have been quantified as an index of lipid peroxidation using GC/MS.

(±)11,12-DiHETE is a dihydroxy metabolite of EPA produced by cytochrome P450-mediated epoxide formation and subsequent hydrolysis by epoxide hydrolase. Plasma levels of (±)11,12-DiHETE are increased over baseline after an oral dose of 1008 mg EPA.