Vitamin B9 (Folate) Test - Folic Acid (Vitamin B9) Test

A folic acid (vitamin B9) test measures the concentration of this essential water-soluble vitamin in the blood. It plays a crucial role in DNA synthesis and repair, rapid cell division, and normal red blood cell formation. A deficiency leads to megaloblastic anemia and is associated with neural tube defects in fetuses. It is measured in serum or red blood cells to assess long-term stores.