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Folate (Serum) Concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of folate, a type of B vitamin, in your blood serum. Folate is important for red blood cell production and DNA synthesis.

Quick summary

["Checking folate levels helps ensure your body has enough of this essential vitamin."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
11905-7
Short code
GA from BPD.Jeanty84
Synonyms
GA from BPD.Jeanty84
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-estimated-from-bpd-jeanty
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Folate Matters in Your Body

Folate plays a critical role in maintaining healthy cells, especially those involved in growth and repair. It helps prevent certain types of anemia and supports proper fetal development during pregnancy.

How the Test Works

Your blood sample is drawn and analyzed using an immunoassay method to detect folate levels. This test helps identify deficiencies that may require dietary adjustments or supplements.

What Normal Results Mean

Normal results indicate your body has adequate folate stores. However, individual reference ranges can vary, so results are interpreted by your healthcare provider.

When You Might Need This Test

Your doctor may recommend this test if you have symptoms like fatigue, weakness, or if you’re at risk for deficiencies, such as pregnant women, individuals with poor diets, or those with certain medical conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Folate Deficiency and Beyond

Short name

Serum Folate

Frequently asked questions

What are the symptoms of low folate levels?
Symptoms of low folate may include fatigue, pale or jaundiced skin, shortness of breath, and neurological issues like memory problems or mood changes. Folate deficiency can also mask vitamin B12 deficiency, so both should be checked if symptoms persist.
How long does it take to see results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will discuss the results with you during your follow-up visit.
Can folate levels change with diet?
Yes, folate levels can fluctuate based on diet. Foods rich in folate include leafy greens, beans, fortified cereals, and liver. If you suspect a deficiency, discuss dietary changes or supplements with your doctor.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy