My laboratory test report suggests an increase in vitamin B12 levels, and I also experience blurry vision, sour mouth, and backbone pain. Why?

Q. What could be the cause of high vitamin B12 levels, sour mouth, and backbone pain?

Answered by
Dr. Goswami Parth Rajendragiri
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on May 23, 2023 and last reviewed on: May 26, 2023

Hello doctor,

I recently got my laboratory test done for vitamin B12. The levels are increased. My LFT tests were normal. I also have blurry vision, a sour mouth, and backbone pain. What is your first advice? What additional tests are needed?

Please help.



Welcome to

I went through your query and understood your concern.

Usually, myeloproliferative neoplasms, kidney diseases, and liver diseases are some of the causes of high vitamin B12 (cobalamin) levels. If you have taken supplements containing vitamin B12, then your B12 can be high. In fact, it is a common cause of elevated vitamin B12 levels. So, I suggest you investigate with a peripheral smear examination report for a primary workup. Get your liver and spleen examined for enlargement by a local specialist doctor. To evaluate kidney disease, I suggest you investigate serum urea and creatinine estimation.

I hope this has helped you.

Thanks and regards.

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