Serum Folate/Folic Acid Test
About Serum Folate/Folic Acid Test
| Field | Value |
|---|---|
| Also Known As | Folic acid test, Folate test, Vitamin B9 test, Folacin test, Serum folic acid test |
| Sample Type | Venous blood (serum) |
| Fasting Required | Yes – 6 to 8 hours of fasting is recommended before the test |
| Report Time | Within 24 to 48 hours |
| Recommended For | All genders and ages; particularly women of childbearing age, pregnant women, individuals with anaemia symptoms, those with alcohol dependence, or those with malabsorption conditions |
| Price | Starting at ₹1,100 |
What Is a Serum Folate/Folic Acid Test?
The serum folate test measures the level of folate (vitamin B9) in your blood. Folate is a water-soluble B vitamin that your body needs for producing red blood cells, synthesising DNA, and supporting normal cell function.
Also known as the folic acid test, folacin test, or vitamin B9 test, it is often ordered when a doctor suspects nutritional deficiency or unexplained anaemia. The sample required is a small amount of blood drawn from a vein.
What Does a Serum Folate/Folic Acid Test Measure?
The serum folic acid test analyses the concentration of folate circulating in the liquid portion of your blood (serum). The table below explains what this measurement tells us.
| Parameter | What It Reflects |
|---|---|
| Serum Folate | The amount of vitamin B9 (folate) present in the blood; reflects recent dietary intake and the body's overall folate status |
Folate levels in serum respond quickly to changes in diet, dropping within a few days if intake falls. This makes the test a useful early indicator of deficiency, even before symptoms appear.
Why Is a Serum Folate/Folic Acid Test Done?
A doctor may request a folate test for several reasons, ranging from investigating symptoms to routine screening.
Common Symptoms That May Require This Test
The following symptoms are among the most common reasons a doctor may order this test:
- Persistent fatigue and general weakness
- Pale skin or unusual paleness
- Shortness of breath without an obvious cause
- Soreness or redness of the tongue
- Mouth sores
- Memory problems, difficulty concentrating, or confusion
- Unexplained weight loss
Conditions This Test Can Help Detect
This test can help identify or support the diagnosis of several conditions, including:
- Megaloblastic anaemia (a condition where red blood cells are abnormally large and poorly formed)
- Folate deficiency due to poor diet or alcohol dependence
- Malabsorption syndromes such as coeliac disease, where the gut cannot absorb nutrients properly
- Neuropsychiatric symptoms linked to vitamin B9 deficiency
- Neural tube defects risk assessment in pregnancy
Serum Folate/Folic Acid Test During Pregnancy
Folate plays a critical role in the early development of a baby's brain and spine. Deficiency during pregnancy is associated with neural tube defects, a group of serious birth defects.
Doctors routinely check folate levels before and during pregnancy, as adequate intake from diet and supplements can significantly reduce this risk. Pregnant women with lower than normal serum folate levels may be monitored more closely throughout their pregnancy.
Serum Folate/Folic Acid Test for Chronic Disease Monitoring
Patients with chronic haemolytic anaemia (conditions where red blood cells are destroyed faster than the body can replace them) may need regular serum folate checks, as active red blood cell breakdown consumes folate rapidly.
People with inflammatory bowel disease are also routinely tested, as some medications used to manage the condition can impair folate absorption over time.
How to Prepare and What to Expect
Good preparation helps ensure your results are accurate and your experience is comfortable.
Do You Need to Fast?
Yes, fasting for 6 to 8 hours before the test is recommended. Eating a folate-rich meal shortly before the test can temporarily raise serum folate levels and produce a misleadingly normal result, even if there is an underlying deficiency. Water is fine to drink during the fasting period.
Practical Tips Before Your Test
Here are a few steps to take before your appointment:
- Avoid folate-rich foods and alcoholic drinks in the hours leading up to the test
- Stop taking biotin (vitamin B7) supplements at least 72 hours before sample collection, as biotin can interfere with the test
- Inform your doctor about all medications you take, especially anticonvulsants (anti-seizure drugs), methotrexate, or oral contraceptives
- Drink plain water to stay well hydrated, which makes blood collection easier
Step-by-Step Procedure
- A phlebotomist (trained blood collection specialist) will ask you to sit comfortably and confirm your fasting status.
- An elastic band (tourniquet) is wrapped around your upper arm to make the veins easier to locate.
- The skin over the chosen vein is cleaned with an antiseptic solution.
- A small needle is inserted into the vein and a modest amount of blood is drawn into a collection tube. You may feel a brief, mild sting.
- Once collection is complete, the needle is removed and gentle pressure is applied to the site with cotton or gauze, followed by a small bandage.
- The labelled sample is sent to the laboratory for analysis.
Factors That Can Affect Accuracy
Several factors can alter your results. Be sure to mention any of the following to your doctor:
- A non-fasting state at the time of collection
- Recent use of folic acid supplements or a folate-rich meal
- Medications such as methotrexate, phenytoin, or sulfasalazine
- Chronic alcohol consumption
- A damaged or haemolysed blood sample, which can produce falsely elevated readings
Understanding Your Serum Folate/Folic Acid Test Results
Your results should always be reviewed alongside your symptoms, medical history, and any other tests your doctor has ordered. The table below gives a general reference framework.
| Parameter | Normal | Low (Possible Deficiency) | Deficient | Excessive |
|---|---|---|---|---|
| Serum Folate | 3.1 – 17.5 ng/mL | 2.2 – 3.0 ng/mL | <2.2 ng/mL | >17.5 ng/mL |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations can influence how your results should be read. Your doctor will take these into account.
Haemolysis (breakdown of red blood cells in the sample) can falsely raise folate readings. Conditions such as pregnancy, lactation, and haemolytic anaemia increase the body's demand for folate, which may cause lower values even with adequate intake.
Chronic alcohol use disrupts how the liver processes folate, often leading to reduced levels. Some anti-seizure drugs and medications used for ulcerative colitis can also affect folate absorption and may produce lower readings over time.
How to Maintain Healthy Levels
These general wellness tips can help support adequate folate levels:
- Include folate-rich foods in your daily diet: leafy green vegetables, legumes, citrus fruits, eggs, nuts, and fortified cereals are all good sources.
- Avoid overcooking vegetables, as high heat destroys the naturally occurring folate in food.
- Limit alcohol consumption, as it interferes with how the body absorbs and uses folate.
Lupin Diagnostics Serum Folate/Folic Acid Test Price and Home Collection
The serum folate/folic acid test is available at Lupin Diagnostics starting at ₹1,100, with home sample collection available across cities in India.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹1,100 |
| Indore | ₹1,100 |
| Bangalore | ₹1,100 |
| Chennai | ₹1,100 |
| Hyderabad | ₹1,100 |
| Kolkata | ₹1,100 |
| Pune | ₹1,100 |
| Bhopal | ₹1,100 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the test on the Lupin Diagnostics website
- Choose your city and preferred time slot
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre
- Receive your report via email or WhatsApp within the stipulated turnaround time
Home Collection
Lupin Diagnostics offers home sample collection for the serum folate test across multiple cities in India. All samples are processed in NABL-accredited laboratories by trained professionals. Your digital report is delivered securely via email or WhatsApp.
Frequently Asked Questions
Folate is the naturally occurring form of vitamin B9 found in foods. Folic acid is a synthetic form used in supplements and fortified foods. Your body absorbs folic acid more easily than natural folate. Both are measured by the folic acid test, though the terms are sometimes used interchangeably.
Folate levels in the blood can rise quickly after eating foods that are high in vitamin B9. If you eat before the test, the result may appear normal even when a long-standing deficiency is present. Fasting for 6 to 8 hours ensures the reading reflects your body's actual stored folate status.
Folate is essential for forming the neural tube in early foetal development. Inadequate levels are linked to neural tube defects such as spina bifida and anencephaly. Testing helps confirm that folate levels are sufficient to support healthy development, particularly in the first trimester.
Yes, doctors often order both tests together. Folate and vitamin B12 deficiency share overlapping features, such as megaloblastic anaemia, so testing both helps arrive at an accurate diagnosis. In some cases, additional tests for homocysteine and methylmalonic acid may also be ordered to distinguish between the two deficiencies.
Yes. Drugs such as methotrexate, phenytoin, trimethoprim, and sulfasalazine can impair how your body absorbs or uses folate, leading to lower readings. Always inform your doctor about any medications or supplements you are taking before having the serum folic acid test done.
Folate levels can fall within just a few days of reduced dietary intake, as serum folate reflects recent consumption fairly rapidly. The body's total folate reserves are relatively limited, lasting approximately four months, which is much shorter than the reserves for vitamin B12.
If you are searching for a 'serum folate test near me' or a 'folic acid test near me', you can use the Lupin Diagnostics website to locate the nearest collection centre or book a home visit. Lupin Diagnostics operates collection points across major cities in India, with reports delivered digitally within 24 to 48 hours.
Serum Folate/Folic Acid Test
