Black feces after eating coconut ash ice-cream may be a normal physiological phenomenon, but we cannot exclude pathological causes of black feces, such as gastrointestinal bleeding.
Coconut ash ice-cream contains some gray melanin, if it is not absorbed by the intestinal mucosa, it will be excreted along with the stool, which is manifested as black stool. No special treatment is needed in this case. Avoid eating this type of food and you will not have black stools. There are some other foods that can cause black feces, such as iron, animal blood products, mulberries and black sesame seeds.
Black feces are also often seen in diseases such as gastrointestinal bleeding, patients usually have nausea and vomiting, abdominal pain and bloating, fatigue and shortness of breath, anemia, this situation should actively seek medical attention to clarify the cause of black feces, if necessary, need to be treated with blood transfusion.