The most popular benefit of kombucha is improved gut health. The probiotics made during fermentation are similar to the good bacteria found in your gut. Better gut health will result in feeling better, improved mental health, clearer skin, and lower risks of a whole host of diseases. 70-80% of our immune tissue is found in the digestive tract, so keeping it healthy will help stave off lots of other issues. Our gut is also where our body makes most of our serotonin, the neurotransmitter that makes you happy. So better gut health will literally make you happier.