It is believed that for centuries people were passing Kefir grains from hand to hand, and that seem to be the case even today. Over 900 international Kefir grains lovers around the globe share their grains with their health conscious neighbors. Kefir grains are a combination of bacteria and yeast used to produce a pro-biotic Kefir fermented drink. There are plenty articles about Kefir, but the good starting point is Dominic's Kefir site.

Where to get Kefir grains? You may find a nearby Kefir source on the International Kefir grains list.