Which fermented beverage is the healthiest?

Kombucha is a fizzy, tangy tea made by fermenting sweetened tea with a symbiotic culture of bacteria and yeast. Kefir is a nutritious fermented milk drink known for its rich probiotic content. Kanji is a traditional Indian fermented beverage made by fermenting black carrots or beetroots with mustard seeds and water. Lassi is a classic Indian drink prepared from yogurt, water, and spices. Beet kvass is a traditional fermented drink made by fermenting beets in a saltwater brine.