Can you use holistic/alternative medicine to support the immune system during chemotherapy?

Controversial. This is controversial amongst some oncologists, as they want to be sure chemotherapy has the best possible chance to work. For instance, some are concerned that antioxidant vitamins can compromise the oxidizing effects of chemotherapy on the cancer. Some cancer centers are integrating naturopathic and/or holistic physicians on staff, who can help the patient without harming the treatment.
Yes. Yes & it is likely to be very beneficial. Many controlled studies have shown that medicinal mushrooms & other supplements decrease side effects of chemotherapy and improve outcomes. But some immune boosters like noni may interfere with chemotherapy, so use caution. See http://www.Doctormurray.Com/2010/12/natural-support-during-chemotherapy/ also support groups, visualization etc. Can boost imm.