iirc all omega3 in non-plants comes from their diet of plants. Similarly we make Omega3 eggs, by feeding them lots of omega 3. Someday we may have omega3 pepperoni pizza by feeding the cows a GMO corn that makes omega3. The more the consumer demands, the more industry will shift to provide, but sometimes it's a comedy. We wanted pasture chickens w/ omega 3 from grass, we got caged birds w/ flaxseed supplements.