Lab test

Folic Acid Test - Folic Acid Deficiency

This blood test evaluates folic acid (folate) levels to check for deficiency.

Typical price

From $29

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

This blood test evaluates folic acid (folate) levels to check for deficiency. Folate is a B vitamin that plays an important role in DNA synthesis and in producing red blood cells. Low folate can lead to a type of anemia and may contribute to fatigue and other symptoms. The test is often ordered when a blood count shows unusually large red blood cells, when a person has a diet low in leafy greens and legumes, or when there is a condition or medicine that affects absorption. It is frequently measured together with vitamin B12.

• Folic acid (folate) Measures the level of this B vitamin in the blood.
• Vitamin B12 Often measured alongside folate because the two interact.

• People with fatigue or a low red blood cell count
• Individuals whose blood count shows unusually large red blood cells
• People with diets low in folate-rich foods
• Those with conditions or medicines that affect absorption

• Fasting may be requested for some panels.
• Tell the collector about vitamin supplements you take.
• Follow any instructions provided for your specific panel.

A low folate level suggests deficiency, which can relate to diet, absorption, or increased needs. A high level is usually related to supplements. Because folate and vitamin B12 interact and their deficiencies can look similar on a blood count, they are usually interpreted together. Discuss results with a healthcare provider, who can identify the cause.

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