Raw cabbage juice is quite safe to consume, according to Dr. Ronald Hoffman. Taking a quart of raw green cabbage juice daily protects the digestive system and helps ulcers heal quicker. Raw cabbage juice is high in gefarnate and L-glutamine, which stimulate mucus secretion and protect the gut's mucous-membrane lining.
Studies show that raw cabbage juice helps heal gastric ulcers faster than using standard therapy, according to PubMed Central. Raw cabbage juice contains Vitamin U, which is an antipeptic ulcer factor that enables some patients to heal in about one week. One study showed that six gastric ulcer patients who were treated with fresh cabbage juice experienced a 7.3-day average crater healing time, versus a 42-day average healing time for six patients who received standard therapy.