Going natural is the best.

Remember that we are bombarded by so many unnatural things. These cause the cells to mutate.

Fungus, Molds, Candida. Look into these culprits as well.
They mimic cancer on x-rays. No way to tell them apart except a biopsy. You already know that these are mutated cells but keeping your healthy cells in great shape helps your body kill off the mutated ones. The battle is inside the body. chemo always kills the good cells as well hence weakening the natural bodies defense. We were created with this fighting ability.
Remember everyone has mutated cells, we just kill them off and flush them out.

Find ways to do this. Enhance good cells with good food and clean oxygen.

Check out your walls and air ducts for mold and fungus. Also check out the magnetic fields around your house. Electronics are terrible at creating stress on the cells. That is why we feel so great when we go out to the "great outdoors" - a lot less electricity combining with our own electrical currents in ourselves.

Stress is the straw that breaks the camels back. Cells are effected with that as well. Emotional stress.

We are also spiritual. You can not push that aside. You are a created being with a spiritual link. Prayer to your creator. Forgiveness through HIS Son Jeshua of Nazareth. We all have bad thoughts, extressions. He is the spiritual Son who can cleanse the spiritual pains. The spiritual world is both evil and good right now. Seek and you will find.

May God help you and lead you to the truth for your Grandmother. We are all struggling to find the truth. I too have struggled and found a lot of truth. Letting go of habits, traditions, and wrong values is hard to do but possible. It's a world that has creped up in us and we are paying the price in our mental, spiritual and physical health. The world's solutions in chemicals are against everything we were meant to live in. Man never has all the answers. We all seek and look to each other for help. If you are a believer, seek your heavenly father. He will guide you to the answers in your own body. It's there where you live. This is the one thing no one considers. You became what you are today in the environment you are in. Think about that and look.