NCIt definition : A nutritional supplement composed of a fermented milk drink prepared by inoculating
cow, goat, or sheep milk with kefir grains, with potential immunomodulating and probiotic
activities. Upon oral administration of kefir, the kefir grains may stimulate the
proliferation of beneficial bacteria in the gastrointestinal (GI) tract. This modulates
the GI flora ecosystem, improves the functions of the intestinal barrier and protects
against harmful viruses and bacteria. In addition, this prebiotic modulates the immune
system and may inhibit inflammation.;