If there were truly effective and proven natural cures for cancer, then there would be no need for oncologists and I suppose MD Anderson (among others) would have to re-focus their mission from cancer research to something else.
Many years ago I remember Steve McQueen had some sort of cancer and wound up seeking a 'natural' cure from a 'physician' in Mexico. The miracle natural cure was Laetrile and predictably McQueen died in spite of the miracle cure. When I looked up Laetrile, amazingly I noticed it is still being touted as an effective cancer treatment and there a giant conspiracy to suppress its efficacy results .