What is kombucha and why are Chinese youth obsessed with the fermentation health trend?

Young people in China are homemaking kombucha, reviving a 1980s fad from the previous generation after the drink became a globally recognised health product. In recent years, kombucha has gone viral in Western countries as a commercial beverage, endorsed by stars such as Kourtney Kardashian and Lady Gaga. The trend has reached China and prompted some drinks makers to release kombucha products. Mea