Summer is a time of vacations, walks under the scorching sun and, of course, cooling desserts. Ice cream, iced milkshakes and soft drinks become a daily ritual for many people. However, often these "summer joys" turn into a real test: just a few hours after eating your favorite dessert, you experience acute bloating after dairy, heaviness, cramps and discomfort in the stomach.

In the summer heat, the desire to quench our thirst with something cool and refreshing often leads us to the shelves with kvass, kombucha or kefir. Traditionally, it is believed that such fermented drinks are almost an elixir of health for our digestion. Marketers convince us of the presence of "live bacteria", and folk medicine has been promoting kvass for years as the best way to improve the functioning of the gastrointestinal tract. But is this really so?