Black stool during ovulation

Pigments in the diet. Some people may consume darker pigments, such as soy sauce or vinegar, in their diet, which may be reflected in their stool. Additionally, some foods, such as coffee and chocolate, may also show up in your stool.

drug. Certain medications, such as antidepressants and antipsychotics, may cause dark stools. These medications may inhibit iron absorption, causing excessive iron accumulation in the stool.

disease. Some illnesses, such as intestinal infection or bleeding, may cause black stool. Intestinal infections, in particular, may cause black stool, accompanied by abdominal pain, diarrhea and other symptoms.