Folic Acid Test
This page explains the folic acid test, what it measures, and how to arrange it. A folic acid test measures the amount of folate (vitamin B9) in your blood. It is usually ordered to check for a deficiency that can cause anemia or other symptoms, or to monitor folate levels during pregnancy or with certain medications.
- Sample type
- blood
- Category
- Vitamin & Mineral
- Turnaround
- 1-3 business days
- Price
- $29
- Referral
- Not required
A folic acid test measures the amount of folate (vitamin B9) in your blood. It is usually ordered to check for a deficiency that can cause anemia or other symptoms, or to monitor folate levels during pregnancy or with certain medications.
What it measures
- Serum folate — The amount of folate circulating in your blood right now.
- Red blood cell folate — A longer-term view of folate stored in red blood cells over the past few months.
- Hemoglobin — Often checked alongside folate to look for signs of anemia.
- Vitamin B12 — Measured together because low B12 can cause similar symptoms and blood changes.
Who it is for
A clinician may order this test if you have symptoms of anemia, a poor diet, trouble absorbing nutrients, or if you are pregnant or planning pregnancy. It is also used to monitor people taking certain medicines that affect folate.
Preparation
No fasting is usually required. Tell your clinician about all medicines and supplements you take, since some can affect the result.
Results and what they mean
Results are reported as a number with a reference range, and a clinician interprets them alongside your symptoms and other tests. A low or high result does not by itself diagnose a condition. This is general information, not medical advice; discuss your results with a qualified healthcare professional.
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 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 this test?
Usually no. Follow any specific instructions from your clinician.
What can cause low folate?
Poor diet, alcohol use, pregnancy, and some digestive conditions or medicines can lower folate.
Can I get results without a doctor?
Laws vary by state, but a clinician typically orders and interprets this test.
Is this test private?
Your results are confidential and shared only with you and your care team.