Test Code FOL Folate
Additional Codes
Cerner |
NextGen |
Folate |
Folate |
Alternate Name(s)
- Folic Acid
- Pteroylglutamic acid
Useful For
Folates are a subset of vitamins related to pteroylglutamic acid (PGA) that function as co-enzymes in metabolic reactions involving the transfer of single carbon units. Folate and vitamin B12 are necessary for DNA synthesis, and consequently normal red blood cell maturation. Folate deficiency can lead to macrocytic (megaloblastic) anemia. Folate is obtained from dietary sources including fruits, green and leafy vegetables, yeast and organ meats. Folate is absorbed from the small intestine and stored in the liver. Low folate intake, malabsorption as a result of gastrointestinal diseases, pregnancy, and the use of drugs such as Phenytoin, oral contraceptives and excessive concentrations of alcohol are causes of folate deficiency. Low serum folate concentrations are an early indication of folate depletion and precede depletion in the tissues. Adequate folate concentrations during pregnancy are also important in the prevention of neural tube defects (NTD) in infants.
Methodology
Competitive binding assay
Patient Preparation
None
Collection Instructions
- Standard phlebotomy practices.
- Protect specimen from light.
Specimen Requirements
Container |
|
||||||||||||
Stability |
|
||||||||||||
Rejection Criteria |
|
Result Reporting and Reference Values
Reported in ng/mL
Age |
Low |
Normal |
0-4 years |
Not Established |
|
4- 150 years |
<4.0 |
>4.0 |
Reflex Testing
None
Limitations
- Ortho reports a bias with the following:
- Biotin can cause a positive bias
- Ortho reports no significant effect with the following:
- Bilirubin up to 12 mg/dL