Why are there products that list fish as an ingredient, but only bear an OU, while other fish products have “OU-Fish” on the label?
Products that contain fish ingredients that exceed 1 part to 60 are labeled “OU-Fish”. If the fish ingredient is present at a ratio of 1 to 60 or less, the OU allows the product to bear a plain OU.
There is a dispute whether fish which is present at the level of nullification, known as Bitul Bishishim (1/60th or less), may be consumed with meat. While Bitul Bishishim is effective for non-kosher ingredients, rabbinic authorities debate whether Bitul Bishishim applies to fish which cannot be consumed with meat because of Sakana (a danger to one’s health). The OU does not mandate the “OU-Fish” designation because of the lenient opinion cited above. Nonetheless, consumers are encouraged to consult with their Rabbis for direction. The presence of fish will be noted on the ingredient panel.
Products which are obviously made from fish (i.e. smoked salmon, canned tuna or sardines) are not required to bear the “OU-Fish” symbol.
