After skin cancer, breast cancer is the most common diagnosed cancer in women in the United States. According to the American Cancer Society, among US women in 2019, there will be an estimated 268,600 new cases of invasive breast cancer and 41,760 breast cancer deaths (ACS, Breast Cancer Facts & Figures, 2019).
Researchers are consistently looking for more effective ways of preventing and treating, not just breast cancer, but cancer in general. Green tea has been extensively studied for its anti-cancer effects; however, scientists are now, more and more, investigating the potential benefits of oolong tea. For example, Chunfa Huang, Ph.D. and her fellow colleagues from the department of internal medicine at Saint Louis University in Missouri conducted a study using "six different breast cancer cell lines (ER+, PR+ or HER2+ and triple-negative), treated under different concentrations of green, oolong, black and dark tea extracts, and determined their biological effects" (Huang, 2018).
What Huang concluded was that "oolong tea can induce DNA damage and cleavage, play an inhibitory role in breast cancer cell growth, proliferation and tumorigenesis, and was a great potential as a chemo-preventive agent against breast cancer" (Huang, 2018). In addition, Huang noted that people who consumed large amounts of oolong tea on a regular basis were 25 percent less likely to develop breast cancer compared with the average incidence in the Fujian province and 50 percent less likely compared with the national average.
Oolong, much like green tea, seems to play a major role in inhibiting breast cancer cell growth and tumor progression. This is extraordinary news in the world of tea! Every year adds another tally of what the incredible health benefits of tea can do.