Mildly spicy with a strong vegetal taste, red cabbage is associated more with soup and coleslaw than with juice. However, this nutrient-packed vegetable can be juiced and added to other vegetable or fruit juices to increase the nutritional content. The U.S. Department of Agriculture recommends eating between 4 to 6 cups of red vegetables per week for adult men and women. It takes 3 cups of chopped fresh, red cabbage to produce a 1/2 cup of red cabbage juice.