Eating purple potatoes has the effect of laxative, usually does not cause constipation.
Purple potato is a kind of coarse grain, rich in crude fiber, can accelerate the speed of intestinal peristalsis, promote the discharge of stool, help improve mild constipation. Eat some purple potatoes in moderation can promote gastrointestinal peristalsis, accelerate metabolism, help the body waste discharge, but also can lubricate the intestinal tract, promote defecation. Constipation patients eat some purple potatoes in moderation, the symptoms will improve.
But usually only for mild constipation effective, if it is serious constipation or stubborn constipation, simply by eating purple potatoes and can not achieve the purpose of treatment. However, if you have diarrhea symptoms, it is not recommended to eat purple potatoes for a short period of time, if the consumption of purple potatoes lead to faster gastrointestinal peristalsis, it will aggravate the diarrhea, which is not good for your health.
If there is a long time constipation, often accompanied by the emergence of disease, it is recommended that should be timely medical care.