Vegetable was very dull, typically comprising mainly some staple product made from rice, rye, barley, wheat, millet or maize. The addition of vegetable matter provided some variety to the diet. The staple diet of the Aztecs in Central America was maize and they cultivated tomatoes, avocados, beans, peppers, pumpkins, squashes, peanuts, and amaranth seeds to supplement their tortillas and porridge. In Peru, the Incas subsisted on maize in the lowlands and potatoes at higher altitudes. They also used seeds from quinoa, supplementing their diet with peppers, tomatoes, and avocados. In Ancient China, rice was the staple crop in the south and
Vegetable juice popular items in vegetable juices are parsley, dandelion greens, kale, celery, fennel, and cucumbers. Lemon, garlic and ginger may be added by some for medicinal purposes. Other common juices include carrot juice, tomato juice, and turnip juice. In Asian cultures, primarily Chinese, "Chinese yam" (Chinese: "shān yào", Japanese: "nagaimo") is also used for vegetable juices. They are used quite sparingly, however, for many Chinese consider it to be a medicine rather than a vegetable. Kale juice marketed as "Aojiru" in Japan has become well known for its purported health benefits and bitter taste. Japan also markets several kinds of vegetable