expression observed, which is involved in AA synthesis from LA. Because elongases are also essential in the biosynthesis of LC-PUFAs, we analyzed the effect of CO and FO on the hepatic expression of Elovl2 and Elovl5, and no impact of treatment on their expression was evident. Previously, feeding FO had no effect on Elovl2 mRNA abundance, but a down- regulation on Elovl5 mRNA levels has been observed (65, 66).