Kefir is obtained from kefir grains, a mass of micro-organisms which allow the fermentation of sugar water or a dairy product. The resulting good bacteria help to promote the good balance of intestinal flora.

The fermented drink improves digestion, relieves inflammation and promotes intestinal transit. It can be made from fruit, which is naturally richer in sugar and vitamins B and C, and milk, which contains more proteins and trace elements, such as calcium. It is important not to exceed the daily dose of one glass, at risk of suffering abdominal pain or diarrhea.