Are RXBARs kosher certified? All RXBARs are certified Kosher by the Orthodox Union when bearing the OU symbol. Buy kosher certified protein bars here Related articles Are RX A.M. Oats kosher certified? Is RX Nut Butter Kosher certified? Can you freeze RXBARs? Can I microwave RX A.M. Oats? Are RXBARs compliant with the Whole30® program rules?