Kefir grains contain a water-soluble polysaccharide known as kefiran, which imparts a rope-like texture and feeling in the mouth.
en.wikipedia.org One can possibly change the nutrient content of kefir by simply fermenting for shorter or longer periods, possibly with each stage providing value.
en.wikipedia.org Kefir contains compounds that have antimutagenic and antioxidant properties in vitro, although it is not established that these compounds have any physiological properties when kefir is consumed.
en.wikipedia.org Historically, kefir has been recommended for the treatment of several clinical conditions such as gastrointestinal problems, hypertension, allergies, and ischemic heart disease.
en.wikipedia.org People with lactose intolerance are able to tolerate kefir, providing the number of live bacteria present in this beverage consumed is high enough (i.e., fermentation has proceeded for adequate time).
en.wikipedia.org