Made from sweetened tea that’s been fermented by a symbiotic colony of bacteria and yeast (a SCOBY, a.k.a. “mother” because of its ability to reproduce, or “mushroom” because of its appearance), Kombucha didn’t gain prominence in the West until recently.
In the first half of the 20th century, extensive scientific research was done on Kombucha’s health benefits in Russia and Germany, mostly because of a push to find a cure for rising cancer rates. Russian scientists discovered that entire regions of their vast country were seemingly immune to cancer and hypothesized that the kombucha, called “tea kvass” there, was the cause. So, they began a series of experiments which not only verified the hypothesis, but began to pinpoint exactly what it is within kombucha which was so beneficial.