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dark streaks in stool

A 34-year-old female asked:
Dr. Michael Samach
50 years experience Gastroenterology
Several possibilitie: Stool can be dark from iron pills pepto bismol (bismuth subsalicylate) or foods like spinach. Black tarry stools may indicate bleeding from the stomac ... Read More
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A 61-year-old male asked:
Dr. Jason Hemming
17 years experience Gastroenterology
Depends: If melena (black, tarry) this may represent bleeding. Otherwise likely a consequence of what you consumed.
A 31-year-old member asked:
Dr. Richard Bensinger
52 years experience Ophthalmology
Diet, blood: Stool will vary from light to dark depending upon the diet. Diets rich is red meat for instance will darken the stool color. If there is GI bleeding ... Read More
A member asked:
Dr. Marc Lewbart
19 years experience Emergency Medicine
Dietary sources: often time dark green stools are the result of diet. foods that have blue in them such as blueberries or other blue food coloring can cause dark gree ... Read More
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1 thank
A 29-year-old female asked:
Dr. Robert Uyeda
45 years experience General Surgery
Things that make: black stools include iron, blood, bismuth, charcoal. There are many more things that can make for dark color.
A 39-year-old member asked:
Dr. Heidi Fowler
25 years experience Psychiatry
Melena?: Black, malodorous, sticky stool can be due to GI bleeding.
A 22-year-old female asked:
Dr. Visalakshi Vallury
24 years experience Family Medicine
Yes: Beets can cause the stool to appear dark or red. They can also cause a false positive on some types of stool occult blood tests.
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A 32-year-old member asked:
Dr. Charles Cattano
39 years experience Gastroenterology
Lots to consider...: Color & texture of stool varies with foods, speed of emptying of the GI tract, medications & supplements ingested, gut flora (unique for each individu ... Read More
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3 thanks
A 42-year-old member asked:
Dr. Alfredo Garcia
56 years experience Pediatrics
Stool color: Decomposed bile, which is originally green, gives stool its yellow color. Having said that, green stool may mean that bile has rushed through the inte ... Read More
A 48-year-old member asked:
Dr. Heidi Fowler
25 years experience Psychiatry
Medical evaluation: Would be prudent if you have black, tarry, malodorous stool as this may be melena (gi tract bleeding).

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