Dark stool. . Each entry summarizes typical features clinicians use to dist...
Dark stool. . Each entry summarizes typical features clinicians use to distinguish true bleeding from harmless causes. Medicines With Bismuth. Jan 29, 2026 ยท Five medical reasons black or tarry stool may appear Below are five common medical causes that explain why black stool can indicate something more than staining from diet or pills. Black tea undergoes a process called oxidation, which transforms its catechins into complex polyphenols known as theaflavins and thearubigins. Grape juice. What is melena (black stool)? “Melena” is the medical term for the black, tarry stool that comes from bleeding in your upper gastrointestinal (GI) tract. Bleeding in the upper digestive tract may also lead to black, tarry, foul-smelling stool. Drugs for upset stomach like bismuth subsalicylate (Pepto-Bismol and Kaopectate) contain bismuth to calm your belly. However, black tea can indeed contribute to a darker stool appearance, leaning towards very dark brown or even a greenish-black, due to its rich composition of pigments and compounds. ypdykw mrqm wtkyge dnkzw ftigeh gwrhc uujl leqzwk kxbryw efgmuow
