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The word kosher means proper or acceptable. But what else do "kosher" and "kosher certified" mean? Find out why even seemingly innocuous foods require supervision.

The Kosher Primer

The Hebrew word "kosher" means fit or proper as it relates to kosher dietary law. Learn all about the parts of the kosher certification process, kosher supervision, and key kosher terms.

Why Go Kosher?

Market research has shown that Kosher certification can increase overall sales by 20 percent. Learn why you should go kosher with OU kosher certification, today!

The Basics of Certification

An easy-to-understand step-by-step guide to kosher certification, kosher supervision, and the process by which your product can become OU Kosher-certified.

The Steps to Certification

An easy step-by-step guide to how you can obtain kosher certification, what the process involves, and a link to the new company application.

Letters of Certification

Search for and print an OU Kosher Letter of Certification. You can search by company, brand or UKD (Universal Kosher Database) Number.

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As an OU-certified company OU Direct lets you manage your OU account online from anywhere – at any time. You can search for OU-certified ingredients, print a Letter of Certification, and more.

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Apply for Kosher Certification