Ganoderma spore powder itself is dark brown, pigment is discharged with the stool so there will be the phenomenon of black stool. The efficacy and function of Ganoderma spore powder is more, often eat Ganoderma spore powder can improve the body’s immunity, can anti-tumor, lower blood fat, strengthen the heart and calm asthma, for patients with stomach diseases, can also play a role in protecting the gastric mucosa and promote gastric power, so it is suitable for patients who are usually weak. The color of Ganoderma spore powder itself is dark brown somewhat black, so after taking Ganoderma spore powder, these natural pigments cannot be completely absorbed by the body, and the performance of black stool discharge will occur. The color of the stool can turn to normal after stopping taking it for about 3-7 days. If black stool still exists after a week or more, it should be considered to be caused by gastrointestinal bleeding, such as gastric ulcer and duodenal ulcer, and the cause should be clarified by routine stool examination or gastroscopy at the hospital.