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Folate, RBC Blood Test

* This is not a home test kit. You will need to visit a local lab for testing.

Also Known As:

Vitamin B9 blood test, folic acid test

Purpose of the Folate, RBC Blood Test

A folate, RBC blood test is typically ordered to diagnose folate deficiency. It also aids in diagnosing malabsorptive disorders and certain anemias wherein red blood cells (RBCs) are not properly formed.

Folate, RBC (467)
Folate, RBC (266015)

What Does the RBC, Folate Blood Test Measure?

This blood test evaluates folate or vitamin B9, an essential nutrient for RBC or erythrocyte production, fetal development, cell growth, as well as protein and DNA synthesis. Folates are derived from dietary sources. Its deficiency can be attributed to inadequate consumption of folate-rich foods or digestive problems involving nutrient malabsorption.

Who Should Take an RBC Folate Test?

Individuals showing the following symptoms of folate deficiency are advised to take the folate RBC blood test:

  • Fatigue
  • Diarrhea
  • Headache
  • Mouth ulcers
  • Muscle weakness
  • Irregular heartbeat
  • Difficulty breathing
  • Depression and confusion
  • Paraesthesia (tingling and pricking)

Pregnant women, in particular, should monitor folate levels as insufficient intake or absorption of this nutrient can lead to neural tube defects. Also, those who are already undergoing supplementation will need to take the test to monitor if the treatment is effective.

Red Blood Cell Folate Level Test Preparation

Don’t take vitamin B9 or folate three to five days before the test.

RBC Folate Lab Test Results

The normal laboratory values for folate, RBC may vary depending on the laboratory where the test was performed and the methods used for the test. You will usually receive a reference interval with an upper and lower limit. Your test results suggest normal serum folate levels if they fall within the range.

Low folate is a common concern due to its association with several conditions, including megaloblastic and macrocytic anemias (characterized by high mean corpuscular volume or MCV). You will likely take a complete blood count (CBC) to assess your RBC production further.

Where Can I Get a Folate, RBC Blood Test Done Near Me?

Follow the steps below to get the folate, RBC blood test.

Step 1: Go to our website’s vitamin and nutrition tests section, select the RBC, folate blood test, and download the lab test order, which will serve as your doctor’s order.

Step 2: Choose a medical lab partner using our lab locator.

Step 3: Choose a lab and get your blood drawn.

Step 4: Expect the lab test results within 2-10 business days in your Personalabs account.

For an exact turnaround time for results, please contact us at 1-888-438-5227. We will contact the lab of your choice (Quest Diagnostics or LabCorp) as turnaround times vary depending on testing location or lab testing provider.

Additional information


LabCorp, Quest

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Results can be provided in as little as 24-48 hrs. For more complex tests, please contact us for turn around times.


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