Flaxseed fed pork: n − 3 fatty acid enrichment and contribution to dietary recommendations

Abstract

The potential to increase n−3 fatty acid (FA) intake via flaxseed fed pork is underestimated when restricted to pure longissimus muscle, whereas a combination of muscle and adipose tissue is typically consumed. Presently, the FA content of pigs fed 0%, 5% and 10% dietary flaxseed for 11weeks was measured in loin, picnic and butt primals (lean muscle with epimysium (L), L plus seam fat (LS), and LS plus 5mm backfat (LSS)). The n−3 FA content necessary for an enrichment claim in Canada (300mg/100g serving) was exceeded in L from all primals when feeding 5% flaxseed, being 4fold that of controls (P<0.001), with further enrichment from inclusion of associated adipose tissues (P<0.001). Increasing flaxseed feeding levels in combination with adipose tissue inclusion amplified total long chain n−3 FA (P<0.05), particularly 20:5n−3 and 22:5n−3. Flaxseed-fed n−3 FA enriched pork can contribute substantially to daily long chain n−3 FA intakes, particularly for societies with typically low seafood consumption.