The American Institute for Cancer Research (AICR) provides an excellent summary of nutritional advice to reduce the risk of cancer.
It promotes whole food and cautions against supplements, some of which can have adverse effects in sub-populations (e.g. betacarotene and vitamin E can increase cancer risk in smokers and ex-smokers). Please consult your professional healthcare practitioner for advice on supplements, prior to taking them.
American Institute for Cancer Research
AICR recommendations for cancer prevention

