Organic White Kohlrabi. Kohlrabi have a juicy, mild cabbage flavor. Kohlrabi is an excellent source of vitamin C and potassium. It is high in fiber (5 grams per cup) which helps you feel fuller longer. It is great for your digestive health. Cruciferous veggies, of which kohlrabi is one, are known for their high levels of antioxidants which help fight cancer and heart disease.