8To investigate the effect of fatty acid composition on broiler meat selenium 9 concentration and antioxidative capacity, 60 broiler chickens were individually fed one out of 10 three high selenium diets, based on either soybean oil (SO), rapeseed oil (RO) or a rapeseed 11 oil/linseed oil mix (LNO). Breasts muscle total selenium concentration was significant 12 decreased (p = 0.007) in the SO compared to RO and LNO dietary groups, while no 13 differences were observed for antiradical power, glutathione peroxidise values or sensory 14 evaluation for the three groups. LNO resulted in an almost five times lower ratio between 15 arachidonic acid and eicosapentaenoic acid and a three times lower n-6/n-3 ratio compared to 16 the SO group. These results indicate that dietary fatty acid composition may affect broiler 17 meat total selenium concentration and suggest that a lowered n-6/n-3 ratio and increased level 18 of n-3 PUFA in broiler meat may increase total selenium in meat.