About Kosher

Kosher means “fit” or “proper”: food that meets Jewish dietary law. Its status starts with two things – the ingredients and the equipment it is made on.

The tenets of Kashrus (kosher dietary laws) are rooted in both the Written and Oral Torah. In the post-Biblical era, Rabbinic scholars elaborated upon these foundational laws, providing necessary details, explanations, and structure. Together, these laws determine which foods are acceptable and conform to the Jewish Code.

The term “kosher” is an adaptation of a Hebrew word meaning “fit” or “proper.” It refers specifically to foodstuffs that meet the strict dietary requirements of Jewish Law.

Determining whether food is kosher depends on two primary variables: the source of the ingredients and the status of the production equipment. Kosher certification serves as a guarantee that a product meets kosher standards by rigorously verifying these two criteria.

A common misconception is that “kosher” implies a Rabbi has blessed the food. There is no truth to this. While Jewish ritual requires reciting a blessing before eating, no blessing can retroactively make food kosher if it does not already meet the required standards.

Ingredients and Equipment

A food’s kosher status starts with two things: what goes into it, and the equipment it is made on. Certification verifies both, and keeps verifying them.

Kosher status starts with two things: ingredients and equipment The ingredients plus the equipment they are made on equal STAR-K certification – drawn as a simple equation with the STAR-K symbol as the result. The ingredients Where each one comes from The equipment What it is made on STAR-K CERTIFICATION

Go deeper

Kosher, in More Detail

Kosher Basics

A Kosher 101 guide for food manufacturers — the categories, the terms, and how a plant qualifies.

Read the guide

Kosher Glossary

A-Z definitions of kosher terms and symbols, for anyone reading a label or a certificate for the first time.

Browse the glossary

Kosher for Passover

What changes during Passover, and what it means for products certified the rest of the year.

Read more

Beware of Fraudulent Symbols

A reprinted warning on fake kosher supervision logos being applied to food products with no certification behind them.

Read the warning

Ready to Learn More About Kosher?

Start with the Kosher Glossary above, or speak with our team to clarify kosher terms, symbols, and requirements for your products and facilities.