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I assume a healthy human, with usual nutrition, without using any drugs or supplements.

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closed as primarily opinion-based by David, WYSIWYG, kmm, iayork, Bryan Krause Apr 17 at 13:36

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ I find this question difficult for several reasons. You assume "normal" nutrition - what is normal? A meal with spinach gives different colour than beetroot stew. I assume, this is about healthy human (since blood in stool can result in dark colour). And how would a proper answer look like - providing a colour hex code, or similar? $\endgroup$ – Arsak Apr 17 at 11:27
  • $\begingroup$ Yeah, it's difficult. For me, ideally, a good answer should contain a colour hex code and the type(s) of nutrition responsible for the dark colour. $\endgroup$ – Michael Bauer Apr 17 at 11:40
  • $\begingroup$ Unless you define what normal is, your question would be considered opinion based and hence put on hold. $\endgroup$ – WYSIWYG Apr 17 at 11:45
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    $\begingroup$ You can say in a healthy human, with usual nutrition, without using any drugs or supplements...and put this in your question. $\endgroup$ – Jan Apr 17 at 12:46
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    $\begingroup$ @MichaelBauer then can you please edit your question to add all the necessary details. $\endgroup$ – WYSIWYG Apr 17 at 13:11
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The darkest stool in a healthy human is black. It can result from eating black licorice, blueberries, blood sausages, Oreo cookies or grape juice.

Other foods that may cause almost black stools: dark chocolate, beets, cranberries, prunes, dark green leafy vegetables, such as spinach or kale.

They are not nutrients, but natural or artificial dyes in the food, that can turn stool black.

Black, tarry and smelly stool is suspicious for bleeding from the upper gastrointestinal stomach (from mouth to stomach), since the acid in the stomach turns blood black.

Sources: (Medline Plus, OU Medicine, 25Doctors.com)

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