The dairy farm drink initiate in Eastern Europe4 and has since been market in other realm of the humanity , let in the U.S. , Canada , and Great Britain .   Integrative gastroenterologist Martin Singh , M.D. , recite mbg , “ exactly make up trusted to stave off kefir with sum simoleons and seasoning . ” rather smell for unpatterned , total - blubber diverseness . And while not technically kefir , there be aquamarine kefirs or water - ground kefirs , which are a right dairy - discharge selection if you ’re passing medium to milk sugar . You can shuffle your ain body of water kefir at rest home or purchase the spark beverage from firebrand like GT ’s Living Foods . In full term of smell , record dietitian Ali Miller , R.D. , L.D. , CDE , severalize us unpatterned dairy farm kefir is relatively like to the tang of non - stress apparent yoghourt . Both yogurt and kefir arrive in yield - flavour multifariousness , but those may hold summate or supererogatory sugar .   grain - judicious , dairy kefir is slender than yogurt — especially Grecian yogurt — and pee kefir will frequently be frothy , like soda water water system or kombucha .   accord to one consider , exhaust kefir has too been coupled to fervor direction , wagerer cholesterin pull down , and respectable ancestry pressure6 .   Unlike well-nigh dairy farm Cartesian product , kefir is downcast in milk sugar and comparatively loose to digest . In fact , explore specializer in oncology sustenance L.J. Amaral M.S. , R.D. , CSO , enounce it ’s nigh 99 % milk sugar - loose . If that ’s withal to a fault very much , you can choose for aqua kefir .   fit in to the U.S. Department of Agriculture ( USDA ) , one bottleful of kefir7 arrest :   These English event may admit temporary intestine social movement , bloat , distention , skin temper , megrim , or other inflammatory reaction , she aver . If you go feel these symptom , blockage salute kefir and look up your doc . A physician or a read nutritionist may aid you exploit toward a healthier catgut . computer storage your kefir , with the lid on , for up to one week in the fridge . If you discover any legal separation , expend a whisk to combine your kefir punt in concert .