Does eating pitaya stool turn black?

If you eat

red pitaya,

it contains a lot of anthocyanins, which cannot be completely absorbed by the gastrointestinal tract. It can be excreted with the stool, resulting in red stool color, but usually it will not be black. Patients with black stool may be related to eating a lot of iron-rich foods, gastritis, gastric ulcer and other factors.

For patients with black stool, you can go to the hospital for relevant examinations to clarify the cause, such as physical examination, stool routine, blood routine, etc.