My grandmother was diagnosed with cancer and given several months to live. She being 90, her doctor, family, and herself decided not to do anything about it and

My grandmother was diagnosed with cancer and given several months to live. She being 90, her doctor, family, and herself decided not to do anything about it and just live out her life. I came across ketogenic diet...but unfortunately by that time I found out about it, the writing was on the wall (she passed away 3 weeks later). If I was in the same position, given the option of doing no chemo and dying; doing chemo, suffering, then dying; or doing no chemo, going on a diet, and maybe somehow it works...I know what I would chose.