Frances-
I've survived breast cancer twice (with node involvement) and oral cancer in situ once. Now I have oral cancer again, a sequelae I believe to mouth sores during chemo for my first breast cancer. I developed oral dysplasia.

I believe strongly in supplements and alternatives and suggest you investigate taking mega doses of Vitamin C if your doctors approve. I never asked my docs, I just did it. It's too bad we can't get good studies on supplements.