Cauliflower has many of the nutrients of other cruciferous vegetables, but it's the only one that is white. Others on the white list like onions and garlic are considered super foods for their amazing health benefits. Onions are a great prebiotic; they feed the probiotics (good bacteria and yeast) in your intestines. Onions and garlic are both members of the Allium family. They can lower blood sugar and have amazing anti-inflammatory and anti-bacterial properties.