When drinking cabbage juice to heal an ulcer you should see results within 7 days of drinking the cabbage juice.
And within one month to 43 days the ulcer should be completely healed when drinking the cabbage juice daily.
The cabbage juice will also provide you with other health benefits as well so while healing your ulcer you'll also be benefiting your health in other ways too due to the Vitamins and antioxidants contained in cabbage juice.