Kefir comprises of a specific and complex mixture of beneficial bacteria and yeasts. The nutritional composition of Kefir varies according to the milk composition, the microbiological composition of the kefir grains used, the time/temperature of fermentation and the storage conditions.
Recently, Kefir has raised interest in the scientific community due to its numerous beneficial effects on health. Currently, several scientific studies have supported the health benefits of Kefir, as reported historically as a probiotic drink with great potential in health promotion. Regular consumption of Kefir has been associated with improved digestion and tolerance to lactose. This research also suggests Kefir can have an anti-inflammatory effect, an anti-allergenic effect and healing effects.
You can find the report from Cambridge University here.