Green Tea can do all of that
Researchers from the Pharmacology Unit, the University of the West Indies, Trinidad and Tobago analyzed a large body of data on Green Tea. The analysis was nonsystematic because there is an overwhelming amount of research available on green tea and its extract. With critical analysis of the research that they examined they determined that Green Tea or an Extract supplying EGCG has a trend towards decreasing the development of both breast and prostate cancer. There is a decrease in relapse in colon cancer after surgery and there is an increased rate of survival in women with ovarian cancer.
The evidence also shows that Green Tea or an Extract of EGCG decreases the risk of developing high blood pressure and that they also decrease the risk of stroke. The analysis of studies is published in the May 21, 2009 issue of the journal Preventive Medicine. Note; this journal deals with prevention regardless if the prevention is from a diet, surgery, a drug, immunization, or a supplement and is not to be confused with a journal dealing with alternative medicine.