The study indicates that daily consumption of acetic acid (what gives kumbucha that tart tang) was shown to improve depressive symptoms and weight loss. The sample cohort is small, but it’s a good sign that it might have a powerful effect! More study needed for sure.
https://equinoxkombucha.com/blog/health/the-science-behind-the-organic-acids-in-kombucha/
Same acid in vinegars, if you want your daily hit and don’t have any kombucha around.
Edit: Ah the study was done with administering 4 tablespoons of vinegar, the kombucha connection is that the acids are the same.