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Vitamin B12

Source Blood 
Mnemonic B12 
Specimen Requirements

1 x 5 mL light green (mint) top PST tube.  Gold top SST tube also acceptable.

0.5 mL plasma or serum

Minimum Blood Volume for Patients less than 45 kg (100 lb) Including Neonates and Pediatrics



 
Specimen Handling   
Additional Information  
Testing Location RIA 
Testing Frequency Weekdays 
Alternate Name(s) Cyancobalamin, Cobalamin 
Reference Interval 155 - 800 pmol/L 


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