Why do so many oncologists tell their patients not to take any vitamins or herbs while they are getting chemotherapy?

I’ve been using nutritional medicine for almost half a century now, and I have to say that I never cease to be amazed at how, even after all this time, I still hear some doctors and “experts” conclusively say there’s never any benefit to taking multivitamin and mineral supplements.

Many people think that overall brain function and cognitive disorders are just a fact of life that goes with getting older.