When I had radiation, I was told prior to starting the treatments to stay away from green tea as it could protect the cancer from the treatment. I'd never heard anything specific about it in regards to chemo, but have always followed the advice you never take any supplements without getting your oncologists approval first. Tonight I found this article in my news feed, and it really hits home how dangerous and untested mixing chemos (or radiation) and supplements can be. I never expected something so 'harmless' as green tea could totally nullify a chemo drug. And keep in mind, Velcade is the only one they've actually tested.