Stool Color Changes: When to Seek Medical Advice - Gastroenterology and Hepatology

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Issues related to bowel movements?


Hello, doctor.
I have been observing my stool for the past few weeks and noticed that the color is a darker brown, but not to the extent of being black.
My diet seems to be fairly balanced, and I have a regular habit of consuming sesame seeds.
Should I consider getting checked? Thank you!

Ms. Chen, 30~39 year old female. Ask Date: 2020/03/05

Dr. Lin Minghui reply Gastroenterology and Hepatology


Hello: The color of stool is related to the foods consumed.
Foods that are high in iron tend to produce darker stool.
Black sesame may contain higher iron content, resulting in darker stool.
Wishing you peace and health.
Sincerely, Dr.
Ming-Hui Lin, Attending Physician, Department of Gastroenterology, Taoyuan General Hospital, Ministry of Health and Welfare.

Reply Date: 2020/03/05

More Info


When it comes to stool color changes, it’s important to understand that the color of your stool can be influenced by a variety of factors, including diet, medications, and underlying health conditions. In your case, you mentioned that your stool has been a deep brown color but not black, and that you maintain a relatively balanced diet with a regular intake of sesame seeds.
Stool color can range from light tan to dark brown, and this is generally considered normal. The brown color is primarily due to the presence of bile, which is produced by the liver and helps in the digestion of fats. When food passes through the intestines, bile pigments are broken down, resulting in the brown color of stool.
However, certain foods can affect stool color. For instance, foods that are high in iron, such as red meat or supplements, can darken stool. Similarly, foods like beets can cause a reddish tint, while green leafy vegetables can lead to a greener stool. Sesame seeds, while nutritious, are not typically known to cause significant changes in stool color, but they can contribute to the overall fiber content of your diet, which is beneficial for digestive health.

In your situation, if your stool remains consistently deep brown and you are not experiencing any other symptoms—such as abdominal pain, changes in bowel habits, or the presence of blood in your stool—there may not be an immediate cause for concern. However, it’s always wise to monitor your body’s signals. If you notice any drastic changes in color, especially if your stool becomes black (which can indicate bleeding in the upper gastrointestinal tract), or if you experience any discomfort, it would be prudent to seek medical advice.

Additionally, if you have any concerns about your diet or digestive health, consulting with a healthcare professional can provide personalized guidance. They may recommend tests or examinations if they suspect any underlying conditions, such as gastrointestinal bleeding, liver issues, or malabsorption disorders.

In summary, while deep brown stool can be normal, it’s essential to stay vigilant about any changes in your body. If you feel uncertain or if your stool color changes significantly or is accompanied by other symptoms, don’t hesitate to reach out to a healthcare provider for further evaluation. Regular check-ups and open communication with your doctor can help ensure your digestive health remains in check.

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