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Kombucha Tea
Kombucha (also tea mushroom, tea fungus, or
Manchurian mushroom when referring to the culture; botanical
name Medusomyces gisevii is a fermented, slightly alcoholic,
lightly effervescent, sweetened black or green tea drink commonly
consumed for its supposed health benefits. Sometimes the beverage is
called kombucha tea to distinguish it from the culture of
bacteria and yeast.
Juice, spices, fruit or other flavorings are often added to
enhance the taste of the beverage.
Kombucha is thought to have originated in Manchuria, China where
the drink is traditionally consumed, or in Russia and Eastern Europe.
Kombucha is now homebrewed globally, and also bottled and sold
commercially by various companies.
Kombucha is produced by fermenting sugared tea using a symbiotic
culture of bacteria and yeast (SCOBY) commonly called a "mother"
or "mushroom". The microbial populations in a SCOBY vary;
the yeast component generally includes Saccharomyces cerevisiae,
along with other species; the bacterial component almost always
includes Gluconacetobacter xylinus to oxidize yeast-produced
alcohols to acetic acid (and other acids).
Although the SCOBY is commonly called "tea fungus" or
"mushroom", it is actually "a symbiotic growth of
acetic acid bacteria and osmophilic yeast species in a zoogleal mat
[biofilm]".
The living bacteria are said to be probiotic, one of the reasons
for the popularity of the drink.
Numerous implausible health benefits have been attributed to
drinking kombucha.
These include claims for treating AIDS, aging, anorexia,
arthritis, atherosclerosis, cancer, constipation, and diabetes, but
there is no evidence to support any of these claims.
Moreover, the beverage has caused rare cases of serious adverse
effects, including fatalities, possibly arising from contamination
during home preparation.
Therefore, the potential harms from drinking kombucha may outweigh
the benefits, so it is not recommended for therapeutic purposes.
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