Drinking green tea has been linked to a reduced risk of several types of cancers. A 2014 study performed at the Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center found that EGCG helped to slow the growth of pancreatic cancer cells – and may even induce tumor cell death.
Another study, performed in 2013 and published in the Journal of Nutritional Biochemistry, found that green tea could help to stunt the growth of breast cancer cells. The study authors wrote:
“The present study demonstrated that the CS [Camellia sinensis] aqueous extract, which closely mimics green tea beverage, has potent antitumor and anti-metastasis effects in breast cancer and could protect the bone from breast cancer-induced bone destruction.”
Research has also linked green tea, and namely EGCG, to inhibiting the growth of prostate, cervical and colorectal cancers.
Green Tea Japan 