San Francisco Sourdough Starter This sourdough starter from Cultures for Health lets you bake deliciously tangy, crusty artisan sourdough bread in the famous San Francisco style. This dehydrated culture is shelf-stable and compact, so you don’t have to worry about it until you’re ready to start baking.  Heirloom starter can be continuously re-used to make more Non-GMO, contains live active cultures and organic white wheat flour Store starter culture in a cool, dry place until ready to activate Makes great gifts for DIY-ers, cooking lovers, health enthusiasts, and more