Dark Green Stool

When it comes to digestion and stool every organism is different, but there are some rules that apply to everyone. The color of the stool can reveal a lot about your health. The normal color stool can be yellow-brown to green, but there are other colors that may be indicative of a serious problem. Nutrition primarily affects the color of feces (green fruit gives greenish, and red beets and carrots carmine color, pale greasy food, a large consumption of milk white-gray), or changes in color may be caused by the occurrence of some pathological conditions. Although green stool is not a serious health problem and being affected by several factors, it is well to consider the digestive problems that lead to this symptom.

What Causes Dark Green Stool?

The color of the stool is a result of the presence of the bile, specifically yellow-green pigment – bilirubin. The liver is responsible for the production of a bile. Bile is a fluid that helps the absorption of fats and fat-soluble vitamins. The functioning of a bile and its secretion play an important role in whether the stool will be white, brown or green whether it will be thicker, thinner or watery. Bile needs time to disintegrate in the intestine, and become brown (after green and yellow), so we can conclude that the cause of the green stool may occur due to bile passing quickly through the digestive tract where it did not have the time to change the color to brown.

Diet And Food

Green stool (green feces) is usually caused by food that is ingested. Food based on plenty of green leafy vegetables can cause dark green stool. A green vegetable, especially spinach is the most common cause of coloration of stool to green. In addition to spinach and lettuce, broccoli or peas can also cause a green stool. This phenomenon lasts as long as the consumption of large amounts of green vegetables. It is not dangerous and is a sign that your body is getting more nutrients than it can use. Food intake and drinks colored with artificial colors also cause discoloration of a stool to green. Some people are particularly sensitive to colors added to food.

Supplements And Medications

Some supplements can cause green stool as well. One of them is the products of iron. Color may change from green to very dark ones. Medications can also be the cause of staining  the stool to green. Antibiotics lead to disturbance of intestinal flora since apart from destroying harmful bacteria, it also destroys the normal flora of the intestine. Laxatives accelerate the flow of the food through the digestive tract and thereby shorten the time it takes for the bile to change from green to brown. This phenomenon is also temporary and stops when you stop taking the medication.

Medical Conditions and Diseases

Some of the diseases of the gastrointestinal system such as, for example, Crohn’s disease, irritable colon, gastroenteritis, and celiac disease affect the passage of the bile through the intestinal system and its absorption. If the bile is not absorbed in the intestines it appears in the stool unchanged, in green color.


Gastroenteritis is the irritation and inflammation of the digestive tract and is characterized by well-known symptoms of “rotten stomach.” The most common cause is a virus, and it is easily transmitted from one person to another by touching, not just by food or drink. If you have gastroenteritis, stay at home, lie down and drink plenty of fluids to prevent dehydration due to diarrhea.

Crohn’s Disease

Crohn’s disease is a nonspecific inflammatory disease of the digestive tract and belongs to the group of inflammatory bowel disease (IBD). In developed countries of Western Europe, the incidence of Crohn’s disease is 2-6 cases per 100 thousand inhabitants. Crohn’s disease may manifest at any age, most often between 15 and 35 years.

Celiac Disease

Celiac disease is caused due to an intolerance to wheat when the mucous membrane of the small intestine cannot tolerate the presence of gluten, which leads to problems in digestion, namely diarrhea – a stool that has a greenish-blue color and a bad smell.

Irritable Colon

This disease in medicine is known by several names, spastic colon, spastic colitis, mucous colitis, flutter colon, and irritable bowel syndrome. It is essentially a disease of a modern man. There are several ways of treatment, but it is essential that there is no organic disease. The main goal of treatment is to establish regular bowel movements.


The digestive system works faster when we have diarrhea. Therefore, bile quickly passes through the intestines and it is not absorbed. Infections, flu, food poisoning may be the cause of diarrhea. When we cure diarrhea, the stool will no longer be green but it goes back to its natural brownish color.


Bacteria or other causes sometimes cause an accumulation of the gas in the intestines and this results in coloration of the stool to green.


The bacteria Escherichia Coli and Salmonella can lead to green stool; however, rare. Salmonella poisoning can occur if you consume unfermented milk products or eat meat that is not well-done and remains partly raw. The presence of bacteria can lead to food poisoning causing symptoms like diarrhea and green stool.


Stress is also one of the causes for the appearance of the dark green stool. This is due to the fact that stress accelerates intestinal peristalsis.

Before You Decide To Visit The Doctor Make Sure To:

  • Practice as much as possible to flush the unwanted substances from the body.
  • Intake as much fluid in the body to reduce the possibility of constipation.
  • Drink lemon juice, sprinkled with pepper with a teaspoon of a maple syrup to purify the organism.