What is the cause of black stool

Black stool refers to black stool, black stool may be caused by diet, taking drugs, digestive system diseases and other factors, the correlation analysis is as follows:

1. Diet

in the intake of iron-rich foods, such as pig blood, chicken blood, pig liver, etc., of which iron may be digested and absorbed by the human intestinal tract, the other part is oxidized into black iron sulfide, resulting in black stool.

2. Taking drugs

If taking iron tablets such as dextran, ferrous sulfate tablets, ferrous gluconate syrup, etc., iron ions cannot be fully absorbed, they will be discharged, causing black stool.

3. Digestive system diseases

If there are gastric ulcers, enteritis, intestinal polyps and other diseases, it will cause bleeding phenomenon, blood retention in the intestinal tract, oxidation reaction with oxygen, resulting in black stool.