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A member asked:

What would be the most likely cause of stool that is sometimes black and sometimes brown in a 14yr teen?

A doctor has provided 1 answer
Dr. Andres R Villar answered

Could be: Could be diet, medication or something more serious , call your md, he/she might want to see you if it persists.

Dr Aronzon agreed

Answered 9/28/2016

5.3k views

Thank

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I just started taking a multivitamin. Can it cause tiny brown/black flecks in stool? I am certain it is not blood in the stool or on toilet paper.

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