Does eating DHA during pregnancy make the stool black?

Patient's question:

No

Doctor's answer:

According to the situation you described, oral iron preparations can cause black stools, because there is a lot of unabsorbed iron in the stool that gets oxidized. This is a normal condition, so there is no need to worry, and you can continue taking the medication. Additionally, ferrous fumarate granules are best taken after meals or with meals to reduce stomach irritation.