Folic Acid - Biochemical Testing
Biochemical Testing of Folic Acid Status
Folic Acid status is usually measured by determination of serum and/or Red Blood Cell Folic Acid levels, in which the predominant folate form is 5-Methyl-THF.
Erythrocyte Folic Acid
Erythrocyte, Red Blood Cell, Folic Acid levels are generally regarded to be less affected by recent changes in Folic Acid intake and is therefore considered to be the best indicator of depleted tissue Folic Acid reserves.
The laboratory reference ranges for Red Blood Cell Folic levels vary between laboratories and countres. The following are representative values:
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- Plasma Folic Acid
- Neutrophilic Hypersegmentation Index (NHI)
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