Vitamin B12 (“Active”) – Serum [B12A]
Test ID: B12A Patient Instructions: No vitamin B12 containing supplements for 24 hours prior to testing. (This test is referred to an external laboratory) Turnaround time: 3 days (temporarily increased from 2 to 3-days 11th May 2026) Sample Collection Instructions: Standard venepuncture procedure Sample Requirements: Yellow (SST) Sample Stability: Postal acceptable Test Datasheet:
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