Eat colloidal bismuth pectin stool why is black

Colloidal bismuth pectin

is a commonly used antidiarrheal drug, which contains bismuth preparations. When the human body ingests colloidal bismuth pectin, bismuth ions will combine with gastric acid and sulfides in digestive juice to produce bismuth sulfide, which has a black color, resulting in black stools.

2. Diet is unreasonable. During the

medication period, if you eat more green leafy vegetables or animal blood products, due to the influence of pigments and iron in food, it can also lead to black stools.

3. Gastrointestinal bleeding

Colloidal bismuth pectin can protect gastric mucosa, and is mostly used for the treatment of gastric ulcer, chronic gastritis and other diseases, which can cause gastrointestinal bleeding. Blood under the action of intestinal bacteria can lead to changes in stool color and black stools.