Effective December 7, 2017, Vitamin B12 (B12) Testing will include the following changes:

Stability:

• Ambient: 24 hours
• Refrigerated: 24 hours
• Frozen: 2 months; freeze once, and protect from light

Reference Range:

• 232 – 1245 pg/mL

If you have any questions about this change, please contact Client Services for assistance.