Derived from either the Arabic ‘keyf’ (joy and pleasure) or the Turkish ‘kopur’ (milk), kefir is a sort of ancient health food. According to legend, the people of the Caucasian Mountains jealously guarded the kefir grains they had been given by Mohammed, believing them to be a source of great power. Poland’s highlanders have been fermenting sheep’s or goat’s milk in animal hide sacks for decades and today this so-called wonder drink has become one of the most popular drinks across Central and Eastern Europe. Read Less