Natural Factors® Wild Alaskan Salmon Oil enteric coated softgels contain 100% pure salmon oil with a naturally-occurring ratio of nearly 1:1 EPA to DHA. The oil is extracted solely from already harvested salmon, using fish parts that would otherwise be wasted and thereby conserving existing stocks. Natural Factors® Wild Alaskan Salmon Oil is regularly tested for chemical residue and heavy metals to ensure a safe and pure source of fish oil.