Folic acid deficiency is a lack of folic acid in the blood. Folic acid (also known as folate) is a B vitamin and is needed to make new cells in your body, including red blood cells. Your body does not store very much folic acid. You need a regular fresh supply to keep healthy. If you do not have enough folic acid you may become anaemic.
This is a companion discussion topic for the original article at https://patient.info/allergies-blood-immune/anaemia-leaflet/folic-acid-deficiency-anaemia