Alternative literature is often highly inaccurate. There is significant evidence that nutritional support can decrease the side effect of conventional treatment of cancer. Vitamin C in pharmacological doses may prolong survival, except in leukemia where it may worsen the prognosis. Vitamin C does seem to decrease side effects from chemotherapy and radiation therapy. Vitamin E in animals protects against hair loss and heart damage from Doxorubicin.
Selenium is correlated with decreased colon cancer rates.
Zinc antagonizes selenium and may promote tumor growth. B12 can promote some tumors and inhibit others. Food allergies may play a role in some cancers. Unconventional nutritional approaches. Commonalties include fresh, whole foods eaten in balanced combinations, and emphasis on a predominantly vegetarian diet.