Folic Acid Lab Test
Folic Acid Lab Test is a laboratory test you can order directly. The folic acid lab test measures the amount of folate (vitamin B9) in your blood. It is ordered to check for a deficiency that can cause anemia or other health issues, or to monitor folate levels during pregnancy or with certain medications.
- Sample type
- blood
- Category
- Vitamin & Mineral
- Turnaround
- 1-3 business days
- Price
- $118
- Referral
- Not required
The folic acid lab test measures the amount of folate (vitamin B9) in your blood. It is ordered to check for a deficiency that can cause anemia or other health issues, or to monitor folate levels during pregnancy or with certain medications.
What it measures
- Serum folate — The level of folate circulating in your blood at the time of the test.
- Red blood cell (RBC) folate — A measure of folate stored in your red blood cells over a longer period.
- Hemoglobin — The protein in red blood cells that carries oxygen; low levels can indicate anemia.
- Hematocrit — The proportion of your blood made up of red blood cells.
- Mean corpuscular volume (MCV) — The average size of your red blood cells; larger cells can be a sign of folate deficiency.
Who it is for
A healthcare provider may order this test if you have symptoms of anemia, such as fatigue or shortness of breath, or if you have a condition that affects nutrient absorption. It is also commonly ordered during pregnancy and for people taking certain medications.
Preparation
No special preparation is usually required. You may eat and drink normally unless your provider instructs otherwise.
Results and what they mean
Results are reported as numbers with a reference range, and your clinician will interpret them along with your symptoms and history. A low level may indicate a deficiency, but only a healthcare provider can determine what your results mean. This is general information, not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the folic acid lab test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Do I need to fast for a folic acid test?
Fasting is not typically required. Follow any specific instructions from your healthcare provider.
What can cause low folate levels?
Low levels can result from a diet lacking folate-rich foods, certain medical conditions, or medications that interfere with absorption.
How long does it take to get results?
Results are usually available within 1 to 3 business days.
Is this test the same as a vitamin B12 test?
No, they are different tests, but they are often ordered together because both can cause similar symptoms.