OK..gents I did some basic research and found this......................
Kefir is a refreshing cultured-milk beverage which originated in the northern slopes of the Caucasus Mountains, believed to date back at least 1,000 years. The tribes-folk of this particular region who possibly developed kefir by shear accident consumed the nutritious beverage in large quantities. These people were renowned for longevity, living long, healthy lives with little to no known disease. An active life span of over one hundred years was common for folks living in the region where kefir was cultured and liberally consumed as part of a staple diet.
Kefir has a uniform, slightly creamy consistency, a sour refreshing flavour, with a slight subtle aroma of fresh yeast [or a very subtle beer-like aroma]. Kefir also has a slightest hint of a natural effervescent zesty tang. There is an assortment of some 40 aromatic compounds contributing to the unique flavour and distinctive pleasant aroma of kefir. Rounding this off, kefir contains between 0.08% to 2% alcohol. However, about .08 to .1% alcohol is a realistic figure for 1-day cultured kefir. Whereas kefir stored for a number of days after separating the natural mother-culture, kefir grains [see following], contained up to 2% alcohol, and possibly 3% alcohol, depending on the type of milk and ripening conditions. [Yep-- wow!].
Traditional, authentic kefir can only be prepared by culturing fresh milk with Kefir grains. Note that Kefir grains should not be mistaken for cereal grains. The natural mother-culture is referred to as grains due to its granular structure and appearance. This is to say that the grain part of the name can be considered as a misnomer. Kefir grains, or kefir granules if you wish, are in fact a natural-starter. The biological structure or each grain [which I feel can be referred to as a bio-matrix] is created through a dynamic association symbiosis between a vast mixture of friendly Lactic acid bacteria [LAB], vinegar-producing bacteria and yeasts strains.
Sounds like this guy DOM is the kefir guru....here's his website.
Fermented milk... http://users.sa.chariot.net.au/~dna/kefirpage.html#what-is-kefir