Hello, I have tried Essiac tea, and I think it is worth trying. I am also taking a number of other supplements - your multivitamin should contain some zinc. You can learn a lot about supplements and herbs from books written by survivors, doctors and nutritionists. One of them is Patrick Quillin's Beating Cancer with nutrition. I am currently reading Herbal Medicine, Healing and Cancer, By Donal Yance. I hope this helps, Joanna