What can cause stools to change to a very dark (almost black but not quite) brown color. No pain or blood, not tarry.

Food& Bile determine. 20 y/o Male asks What can cause stools to change to very dark (almost black but not quite) brown color. No pain or blood, not tarry.Stool colors are mostly determined by the Food one eats & the amount of Bile secreted into the Gut for the Digestion. Since this is not bloody or tarry focus will be on much green vegetables, Iron Supplements, digestives like Pepto-Bismol or sweets like Black Licorice.