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Folate Blood Test, RBC

A Folate Blood Test is useful for detecting folate deficiency, monitoring therapy with folate, and evaluating megaloblastic and macrocytic anemia

Test Code: 285700

Also Known As: Folates, RBC and Serum (With Hct)

Methodology: Folates: Electrochemiluminescence immunoassay (ECLIA); Hematocrit: Automated cell counter

Preparation: No fasting required. Do not take vitamins containing folic acid three to five days prior to testing. Stop biotin consumption at least 72 hours prior to the collection.

Test Results: 2-3 days. May take longer based on weather, holiday or lab delays.


Folate is fundamental for your body to produce new red blood cells.  These are needed to transport oxygen to your organs, and not having enough red blood cells can lead to anemia.  

Folate is often measured at two levels

  • plasma (or serum) which will show short-term folate absorption
  • RBC Folate which will determine the long-term folate absorption





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