I think it depends on the type of myeloma you have and stage
I would definitely go to a larger cancer center like the Mayo Clinic in Scottsdale

Age may well be the reason, especially if their are any additional health issues like diabetes 2 or 2_ previous or current lung, liver or kidney issues, and a number of other things. Those commodities severely complicate things. As to naturopathic medicine, some find it useful as an adjunct to traditional medicine. However never start supplements without discussion with your doc. Some can actually interfere with treatment and make matters worse. I wish you the best of luck!