OK Kosher Certification OK כשרות

OK Kosher Certification is a major kosher certification agency based in Brooklyn, New York, and one of the "Big Five" largest US kosher certifiers, with a large presence in Asia. Its roots go back to 1935, when Abraham Goldstein founded Organized Kashrut Laboratories (OK Labs). In 1968 Rabbi Bernard Levy bought OK Labs, then certifying a small number of companies, and under his leadership it grew and began certifying companies internationally.