As the other ladies have said, a healthy lifestyle will definitely help your body while you have treatment and help to prevent a recurrence. I found exercise in particular really helped me during Chemo. I'm afraid that once you have a tumor, you really need to do the recommended treatment as well as the healthy eating and exercise to support this. Also be very cautious about supplements or extreme dietary changes while you are actually having chemo and radiation as they can interfere with each other and do more harm than good.
Nobody wants to go through chemo etc and have it not be effective because of effects from alternative therapies.
It is your body and therefore your choice as to what treatment you choose. Complimentary treatments can help but if you are having Chemo always check with the oncologist about any other treatments you might be considering to try and help yourself. I hope you reach a decision that you are comfortable with and that friends and family realize that you need their support no matter what treatment you decide upon. All the best. Deanne xx