Kefir is one of the world’s oldest functional beverages. Originating in the mountains of the Northern Caucasus, Russia, it was a dietary staple for centuries.
There, kefir was made by placing milk and kefir grains into a goatskin bag and hanging it in a sunny doorway. Known for its health benefits, it was enjoyed by people who were believed to have some of the longest lifespans in the world.
