Folate (Serum)
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Folate (Serum) changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Folate (Serum)?
A B vitamin (vitamin B9) your body needs to make DNA, build new cells, and form healthy red blood cells.
A serum folate test reflects your recent folate intake and helps show whether you are getting and absorbing enough of this vitamin. A low level can be associated with folate deficiency, which may lead to a type of anemia with tiredness and weakness; in people who could become pregnant, low folate is linked to a higher risk of neural-tube birth defects. A high level is usually not harmful and often just reflects supplement or fortified-food intake, but it can mask a vitamin B12 deficiency. Folate deficiency is rare in the United States.
What to know about Folate (Serum)
Understanding Folate (Serum) means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.