Kombucha is a fermented drink that has gained popularity in the United States because of its supposed health benefits. The fermentation process yields a product rich in B vitamins, vinegar, protein and other substances. Most kombucha products are raw and organic, meaning that the kombucha is never heated and all ingredients are produced without pesticides, genetic modification, radiation, sewage sludge or synthetic fertilizers. Natural flavors are often added to make the kombucha more palatable and include orange, ginger and cayenne.
Potential Benefits
Kombucha is touted as remedying hair loss, preventing cancer, improving digestion, boosting your immune system and improving energy levels. Since kombucha is never heated, it contains live cultures that are thought to have a probiotic effect. Vital vitamins, minerals and organic compounds are also preserved. Consuming B vitamins, produced during fermentation, aids in metabolism, says exercise physiologist Jack Wilmore in his book, "Physiology of Sport and Exercise." Other compounds, such as L-lactic acid, glucuranic acid and acetic acid, also have potential health benefits.
Controversy
According to Dr. Brent A. Bauer, an internist at the Mayo Clinic, research on the benefits of kombucha has never included human subjects, only animals. The most favorable evidence about the effect in humans comes from personal and anecdotal experience, although research on animals has shown positive effects on the immune system and liver. He notes, however, that just because the benefits of kombucha haven't been shown in humans doesn't mean that it isn't beneficial.
Cautions
Kombucha contains caffeine and alcohol. Caffeine comes from the tea in the original mixture and the alcohol content is a result of the fermentation process. Amounts vary brand to brand and decaffeinated products may be available. If you are pregnant or nursing, avoid consuming large amounts of kombucha. Check with your doctor if you are taking any medications. Some people have reported upset stomach and allergic reactions after ingesting kombucha.
Getting Kombucha
Kombucha can be purchased ready-made or brewed at home. Ready-made kombucha is distributed nationally by many supermarkets and specialty stores. Brewing kombucha at home requires attention to detail. A sterile environment is crucial to prevent contamination with dangerous substances like lead, unwanted bacteria and dangerous fungi.
References
- Sloan-Kettering Cancer Center; Kombucha; 2010
- MayoClinic.com; Kombucha Tea; Brent A. Bauer, M.D.
- "The New York Times; A Strange Brew May Be a Good Thing; Malia Wollan; March 2010
- U.S. Department of Agriculture; Organic Production/Organic Food; Mary V. Gold; June 2007
- "Physiology of Sport and Exercise"; Jack H. Wilmore, et al.; 2004
- "Biomedical and Environmental Sciences"; ...Properties of Kombucha Tea; Pauline T. Dipti, et al.; 2001
