Yun Bai, a professor at the department of medical genetics has in a scientific study* found that the antioxidant EGCG, found in green tea, can directly increase the production of neutral stem cells. This study among others reveal the huge potential of green tea when it comes to degenerative illnesses and memory loss.
Try and look into some of these studies and read for yourself, what scientists say about the original tea plant Camellia Sinenses and its health benefits. Read the studies about the positive effects on Alzheimer, cancer, high cholesterol, etc.
*Molecular Nutrition & Food Research, 2012; 56 (8).