If one of your choices was brussels sprouts, cabbage, curly cabbage, or kale, and the other choice was garlic, green onions, or leek, you get a gold star! Of all the vegetables tested, those had the most cancer-preventing potential. Notice anything they have in common? All the top choices belong to one of only two superfood families: cruciferous vegetables and the allium veggie family, which includes garlic and onions.
