This is a very common question and one with no good answers. The best way to boost the immune system is with a medication called Neupogen (assuming the low dose chemo is weekly) or Neulasta (if the chemo is every 3 weeks) but this isn’t something you can do on your own and would require a prescription. I think the question you raise is referring to vitamins, certain foods, or complimentary medicine ways to boost the immune system. I’m not aware of anything non-prescription therapy that can overcome the immunosupressive activity of chemotherapy.