Stop or reduce B12 supplements if you are taking them
Review multivitamins, energy drinks, and fortified foods for added B12
Ask your doctor whether any injections or high-dose oral B12 should be paused
Recheck the blood test to confirm the result
Evaluate for liver disease, kidney disease, blood disorders, or other causes of high B12
Treat the underlying medical condition if one is found
Avoid self-treating based on a single lab result
Follow up with a healthcare professional for repeat testing and interpretation