Black tea as good as green in oral cancer prevention, research shows!
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Researchers in India have uncovered evidence to suggest drinking black tea could help prevent the development of oral cancer in subjects with leukoplakia, a disease that causes white spots to appear on mucous membranes on the tongue and in the mouth.
The preliminary results of a study at the Vivekananda Institute of Medical Sciences in Kolkata, published in the Journal of Environmental Pathology, Toxicology and Oncology, show that micronuclei frequency and chromosomal aberrations significantly decreased in the first 15 participants to complete a year-long program of drinking black tea ( Camellia sinensis ) three times a day. |
Although the positive results relate to just a small group, they are consistent across all subjects who have completed the study so far. The results for another 67 participants will be available by April 2006.
Changes in the appearance and quantity of leukoplakia white spots in the mouths of the patients who have completed the study to date were also noted.
According to the researchers, oral carcinoma is the most common malignancy found in Indian men and the third most common in Indian women. In half of all cases, precancerous lesions, usually leukoplakia, appear prior to the development of full-blown cancer.
Most of the research into tea's potential for reducing the risk of various types of cancer has involved green tea which, although also derived from Camellia sinensis, contains different active compounds from black tea due to its production process.
For green tea, the leaves are steamed and dried, a procedure that preserves catechin polyphenols such as the powerful antioxidant epigallocatechin gallate (EGCG).
Black tea, on the other hand, is made by oxidizing the leaves, which converts the EGCG into other compounds. In the past scientists have unfavorably compared the benefits of compounds such as theaflavins and thearubigens to EGCG, but black tea is starting to gaining credence as a health-promoting preparation in its own right. |
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Black Tea Benefits Trivia:
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Antioxidants in black tea help fight the damages wrought by free radicals which are viewed as the source of many of today's debilitating diseases. Did you know that aside from the catechins that are so abundant in tea, there are a lot of other types of antioxidants? Discover them all here. Black tea is abundant in the antioxidant compound known as quercetin. Quercetin is a plant-based chemical, or phytochemical, known as a flavonoid. Its proponents say that quercetin helps in protecting against heart attacks, strokes and cancer. Read more about quercetin here. Aside from black tea, the flavonoid quercetin can also be found in such fruits as apples, vegetables such as onions, and drinks such as red wine. Black tea has a high magnesium content. Magnesium is a water-insoluble mineral that aids in helps in forming healthy bones and teeth. It also may help reduce the severity of asthma attacks. Go here for more info on magnesium. Black tea contains a good amount of caffeine, though not as much as coffee. A cup of black tea is said to yield only about a half or a third of caffeine as a similar cup of black coffee. While caffeine is believed to help sharpen and improve brain performance, it is also known to contribute to palpitations and insomnia when taken in large amounts. Learn more about the caffeine content of black tea here. Black tea has a considerable content of Vitamin B1 or thiamine. Thiamine is a water-soluble vitamin that enables the body to use its carbohydrate intake for energy-use. It also helps enhance blood circulation. Discover the benefits of thiamine here. The quality of the water used to brew the tea is very important. It is believed that the water used must be free of contaminants and contain enough oxygen to enhance the natural flavor of the tea. Teas made with pure water yield a crisp flavor and a clear brew that is aesthetically pleasant. Learn more about the health benefits of water here.
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