People who eat a moderate amount of cabbage usually do not pass black stools, and cabbage does not change the shape of the stool. If people eat too much cabbage, they may pass dark green feces. When people have black stools, it is recommended that they go to the hospital for further examination to identify the cause of the problem and treat it. Cabbage does not affect the nature and shape of the bowel movement. If people have black stools after consuming cabbage, other food interferences should be ruled out (e.g., excessive intake of iron-containing food, etc.). If the cause is not food, and accompanied by abdominal pain, hiccups and other uncomfortable symptoms, it is necessary to go to the hospital for examination and treatment to avoid missing the best time for treatment and delaying the condition.