Black coffee does not have a therapeutic effect on constipation caused by diseases of the organs. Black coffee can only serve as a laxative aid and cannot be used as a curative method. Depending on the individual’s condition, it is advisable to consult a nutritionist to see if coffee is suitable for you. The caffeine contained in coffee can be used to refresh the mind and stimulate the mucous membrane of the gastrointestinal tract, promoting gastrointestinal peristalsis and assisting in defecation. People with insomnia, gastrointestinal disorders, etc. are not recommended to drink coffee. People in constipation is recommended to moderately increase the intake of crude fiber (such as celery, sweet potatoes, etc.). Physical conditions allow people can also be appropriate to eat some bananas and yogurt.