http://goo.gl/XFX26k Oils from salmon and tuna contain a key omega-3 EFA called eicosapentaenoic acid (EPA), which inhibits a type of prostaglandin hormone. This hormone both increases inflammatory substances, while at the same time increases prostaglandins that inhibit inflammation. Salmon oil, which contains 18 percent EPA, is amazing in reducing inflammation and pain and increasing joint flexibility.