Two months after I was done with radiation (5 1/2 years ago), they sent me to the dietition at the hospital who put me on ( I was 5'5' 118 lbs) 80g of protein a day (you'd obviously need more) and 220mg Zinc, 500mg Vitmain C twice a day, 400 mg vitamin E twice day, and a multivitamin that contains everything under the sun. I also take 500mg calcium twice daily.

To help get the 80g of protein, I still drank a can of Ensure PLUS for breakfast, drank fortifeid milk with my meals, etc. Yogurt also has lots of protein and easy to eat.

They did this to improve my ability to heal but I do think this helped with my energy level as well and still take all those vitamins aand zinc today. Haven't had a sniffle since. I'd check this with your doctor first since you are not supposed to take vitamins if while you have cancer.