Foods Commonly Cause Dark Stools and When to See a Doctor
                                
                                
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                                    4 min read                                
                            
                                According to MedlinePlus, consuming dark-colored foods like black licorice and blueberries, or taking iron pills and bismuth-containing medications, can cause black or dark stools. This temporary change in stool color is often harmless, but it's essential to understand the difference between a dietary cause and a more serious medical condition.