- female
- 45 Years
- 22/01/2025
I'm wondering if fasting is necessary for a Vitamin B12 blood test. I had mine done about 3 hours after lunch, and now I'm second-guessing whether that might have affected the results. Should I think about getting it retested?
Answered by 1 Apollo Doctors
A Vitamin B12 blood test does not typically require fasting. It is usually safe to have the test done at any time of the day, regardless of when you last ate. Since you had the test done 3+ hours after lunch, there is no need for a retest. The results should still provide valuable information about your Vitamin B12 levels.
Answered 04/07/2025
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Disclaimer: Answers on Apollo 247 are not intended to replace your doctor advice. Always seek help of a professional doctor in case of an medical emergency or ailment.