Laboratory Test Information Guide

Details for Folate, Red Blood Cells

Test Name: Folate, Red Blood Cells
Alternate Name(s): RBC Folate
Laboratory: Core
Specimen Type: Adult:
4 mL Lavender top (K2- EDTA) Vacutainer tubes

0-2 years: 0.5 mL Lavender top (K2-EDTA) Microtainer
2-10 years: 3 mL Lavender top (K2-EDTA) Vacutainer tubes
Collection Information: Minimum volume of whole blood required is 2 mL for adult samples or 0.5 mL for pediatric samples.

Samples will not be sent to the testing facility unless biochemist approval has been obtained. Please contact Dr. Angela Rutledge (ext. 77626) or the on-call biochemist to request approval.
Test Schedule: Referred out Monday-Thursday
Turnaround time from when specimen
is received in testing laboratory:
5 days
Reference Range: >1475 nmol/L
Effective Date: 2017-06-15
Revised Date: 2020-06-22
Critical Value:  
Interpretive Comments:  
Special Processing: Freeze whole blood.
Comments: Current nutritional supplementation makes folate deficiency exceedingly rare in North America. As of March 31, 2017, there has not been a case of folate deficiency detected in the past 18 months at LHSC. The test should only be considered in suspected severe nutritional deficiency or malabsorption.
Method of Analysis: ECLIA
Critical Information Required:  
Storage & Shipment: Store and ship frozen. If the specimen thaws, it is unsuitable for analysis.
System Codes: 
Referred To: In-Common Laboratories

Questions? Comments? Contact Laura Gopaul