Scientists at Case Western Reserve University (CWRU) and from University Hospitals of Cleveland (UHC) have proven that ingredients in White Tea can boost the immune function of skin cells and help protect them from the damaging effects of the suns radiation. The discovery could be important in the fight against skin cancer according to the researchers.
Similar to the way oxidation rusts iron, oxidative stress of the skin causes a breakdown in cellular strength and function; the white tea extract protects against this stress according to Dr Elma Baron, director of the Skin Study center at UHC and CWRU.
As part of the study a White Tea Extract put in a cream was applied to a persons buttock; a place not normally exposed to sunshine. Another area was left unprotected. Both areas were then exposed to artificial sunlight. Researchers then reapplied the White Tea Extract containing cream to the previously treated area. Three days later the skin was checked and radiation had destroyed the skins Langerhans cells; cells which point out mutated-cancerous cells or infectious bacteria to the immune system. However, with pre and post treatment with White Tea Extract these immune cells were not destroyed. The cells also functioned normally exposing bacteria and mutated tissues to the immune system,
Dr Kevin Cooper, chairman of the department of dermatology at UHC and CWRU said ?We know that younger skin tends to be able to resist the oxidative stress associated with exposure to the destructive rays of sunlight. The White Tea Extract also appears to build the skin?s resistance against stresses that cause the skin to age?.
The same process that causes immune system damage in the skin can also promote skin cancer and aging of the skin including wrinkling and mottled pigmentation; the researchers believe the antioxidant properties of the White Tea may provide anti-aging benefits. The study appears in Science Daily, 1.30.03.
White Tea and Green Tea Polyphenols may be equivalent to prescription NSAID drugs in preventing colon cancer
NSAID drugs commonly used for arthritis have known benefit for preventing colon cancer. Clinoril is the trade name for sulindac; a NSAID drug with great promise for inhibiting cancer including lung and colon cancer.
Epidemiological, pilot, laboratory, and animal studies have identified polyphenols from tea as inhibitors of the cancer process including colon cancer. In male rats, White Tea inhibits the ability of dangerous chemicals to cause cancerous changes in the colon. In this study both White Tea and Green Tea Polyphenols were tested for the ability to suppress the formation of colon cancer and they were compared to sulindac?s cancer suppressive ability which is known to be highly effective in the mice tested. After 12 weeks of treatment, mice given White Tea, Green Tea, or sulindac had significantly fewer cancerous tumors than untreated mice. The protection given by the polyphenols from White Tea or Green Tea were comparable to sulindac. If mice were treated with both White Tea added to sulindac the number of tumors was significantly fewer than either treatment alone. The study was performed at Oregon State University and is published in the February 2003 issue of the journal Carcinogenesis.
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