Kefiran

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Kefiran is the clear or pale yellow slimy polysaccharide gel exuded by dairy kefir grains.

Dairy kefir grains are symbiotic consortia of bacteria and yeasts which ferment mammal milk containing the complex sugar lactose. Kefiran has been shown to exhibit certain medicinal qualities, and it contributes to the organoleptic (mouthfeel) qualities of kefir.