There is a scripture that says, "My people are destroyed for lack of knowledge." Medical science has refused to acknowledge the value and preventive capabilities of rare earth minerals because those (nor the usage of them) can be patented ... so the medical industries cannot make huge amounts of money on them!
You (and everyone else) need to be aware of TWO FACTS! Number one, cancer cannot survive in an alkaline environment, and two, SELENIUM not only prevents cancer, but also can reverse cancer!
https://www.alltheinternet.com/?q=selenium+research&ref=12282017101231&p=
www.seleniumresearch.com