Cauliflower is a cruciferous vegetable that is naturally high in fiber and B-vitamins. It provides antioxidants and phytonutrients that can protect against cancer. It also contains fiber to enhance weight loss and digestion, choline that is essential for learning and memory, and many other important nutrients. Fresh cauliflower should have a firm head with no dark spots, and bright green leaves attached to the stem. Store in the refrigerator in a plastic bag for up to 5 days.