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:
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| Reference values* |
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| Associated tests |
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| How it is done? |
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| How long before I get the results? |
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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.