Yes cabbage along with other green leaf foods are good for your stomach.
Cabbage has been used for years as a natural medicine to help with stomach issues.
Eating cabbage can also help with stomach pain and intestinal ulcers, acid reflux and the cabbage is also very healthy for you as well.
However if you do eat too much cabbage then it can cause bloating and stomach aches as well as possible diarrhea.
But in moderation cabbage can help with settle your stomach and help with the stomach pain and acid reflux.
Other foods such as broccoli and Lettuce, Brussels Sprouts asparagus, and cauliflower are also good for your stomach but can also cause gas buildup in your stomach when eaten in excess.
But in moderation they are very healthy for you and can improve your health and give your body energy as well.