RBC Folate and Serum Folate-Introduction, Test Result, Unit, Reference Range, Test Methods, Clinical Significance, and Keynotes
Table of Contents
RBC folate measures folate inside red blood cells. Serum folate measures folate in the circulating blood.
Moreover, these tests assess both long-term and short-term folate status. Furthermore, they help detect nutritional deficiencies.
Test results reveal the folate concentration level. They indicate deficiency or adequacy in the body.
Additionally, the values guide appropriate treatment decisions. Thus, clinicians rely on these results to manage care.
RBC folate is reported in nanograms per gram of hemoglobin. Serum folate is expressed in nanograms per milliliter. Consequently, laboratories use consistent unit standards.
RBC folate reference values usually range from 140 to 628 ng/g hemoglobin. Serum folate reference values typically range from 2.7 to 17 ng/mL. However, these ranges may vary with age and population. Thus, each laboratory may adjust ranges slightly.
Laboratories use immunoassays to measure folate levels. Chemiluminescent immunoassays commonly test serum folate. Some labs use radioimmunoassay for RBC folate. Moreover, microbiological assays serve as alternative methods. Therefore, test methods evolve with advancing technology.
Clinicians assess folate status to prevent megaloblastic anemia. RBC folate reflects long-term folate storage. Serum folate reflects recent dietary intake. Additionally, low folate levels increase cardiovascular risk. Furthermore, proper folate status supports fetal development.
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