What is the shelf life of brewer's yeast?

The shelf life of brewer's yeast typically ranges from 6 months to 2 years when stored in a cool, dry place, unopened. Once opened, it should ideally be refrigerated and used within a few months for optimal potency. Always check the expiration date on the packaging, as it can vary by manufacturer. Proper storage is key to maintaining its effectiveness for brewing or baking.