Folate (vitamin B9) is needed to make red blood cells and DNA. It is especially important before and during early pregnancy.
- Normal range (adults)
- 3–20 ng/mL (6.8–45 nmol/L)
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Folic Acid, Serum Folate, Vitamin B9, B9, Folic Acid Level
Folate normal range
| Group | ng/mLConventional units: US, South Asia | nmol/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Adults | 3–20 | 6.8–45 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Folate test done?
It is checked for anemia with large red cells, in pregnancy planning and in people with poor diet or alcohol use.
What does a high Folate level mean?
High folate usually comes from supplements and is not harmful, but high doses can mask B12 deficiency.
Common causes
- Folic acid supplements
- Fortified foods
Diet and lifestyle tips
- Make sure your B12 is also checked
What does a low Folate level mean?
Low folate can cause anemia, tiredness and mouth ulcers. In early pregnancy it raises the risk of neural tube defects in the baby.
Common causes
- Low intake of leafy greens and legumes
- Alcohol
- Pregnancy
- Some medicines, such as methotrexate and some anti-epileptics
- Gut conditions
Diet and lifestyle tips
- Eat leafy greens (spinach, methi, salad leaves), lentils, chickpeas, beans, oranges and fortified flour
- Avoid alcohol
- Women planning pregnancy should take folic acid as advised by their doctor
When should you see a doctor?
Discuss low folate with your doctor; B12 should be checked at the same time.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.