Folic acid, serum

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Folic acid, serum

Serum folic acid

Folic acid, also known as vitamin B9 or folates, is a vitamin found in food. It is required for the body to function properly. Among other things, it is involved in the formation of normal, functional white blood cells, platelets, and red blood cells. Folates are also important for normal fetal development.

What is the purpose of this test?	This test is used for several reasons: To assess the nutritional status of people at risk of deficiency To help diagnose different types of anemia To help diagnose people with neuropathy (nerve cell damage) To monitor the effectiveness of folic acid or vitamin B12 supplements To assess whether an expecting mother's folic acid levels are high enough to prevent certain birth defects in the fetus
How to prepare?	Fast. Do not eat or drink anything (except water) for 8 to 12 hours before the test.
Reference values*	≥ 10.0 nmol/L
Associated tests	Complete blood count Vitamin B12 test
How it is done?	Small blood sample, usually taken from a vein in the arm
How long before I get the results?	Results are usually ready in a day. It may take longer to receive your results.

* These values are presented for information purposes only. As different laboratories may have different reference values, the lab report usually specifies the values used for the test. It should also be noted that test results must be interpreted based on factors such as age, sex, and health condition. Values outside of this range may be considered normal for some individuals.

What does an abnormal test result mean?

High values of folic acid:

Usually insignificant and do not require any follow-up
May be the result of a high-folate diet (the form of folic acid found in food)
May indicate vitamin B12 deficiency and a form of anemia

Low values of folic acid:

May indicate the presence of a form of anemia
May be the result of inadequate folate intake (e.g., undernutrition, alcoholism)
May be a sign that folic acid is not being properly absorbed by the intestine (e.g., celiac disease, Crohn's disease)
May be the result of an unmet need for increased folic acid (e.g., during pregnancy, breastfeeding)
May be the result of certain medications (e.g., oral contraceptives, methotrexate, certain anticonvulsants)

What you should know before going for this test

When you go in for a blood test or any other medical exam, it's always a good idea to bring a complete list of any prescriptions, over-the-counter medications, or natural health products you're taking. Unless otherwise advised, it's best to take your medications as usual on blood test days. If in doubt, don't hesitate to talk to your healthcare professional.

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The patient information leaflets are provided by Vigilance Santé Inc. This content is for information purposes only and does not in any manner whatsoever replace the opinion or advice of your health care professional. Always consult a health care professional before making a decision about your medication or treatment.