A very interesting study from Richard Béliveau, Ph.D, states that certain vegetables inhibit certain cancer by up to 90% (animal study).
34 vegetables were used on 8 different tumor cell lines derived from the stomach, kidneys, prostate, breast, brain, pancreatic and lung cancer.
Read the full study here.
Keep in mind, eat Organic & GMO Free. Vegetables that contain pesticides or herbicides may have the opposite effect.