Orthodox Union Kosher, known as OU Kosher or OUK, is a kosher certification agency based in New York, New York. It was founded in 1923 by Abraham Goldstein. It is the certification agency of about 70% of kosher food worldwide, and is the largest of the “Big Five” major certification agencies, which include OK, Kof-K, Star-K, and CRC. OU Kosher was founded in 1923 by East Prussian chemist Abraham Goldstein as the first independent kosher certification agency. Goldstein established the kosher certification program under the Union of Orthodox Jewish Congregations. The certification’s symbol – the letter “U” inside of the letter “O” – was first placed on Heinz’s vegetarian baked beans, confirming that their food was certified kosher. More information...
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