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Is chest pain a symptom of vitamin B12 deficiency?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am a 31-year-old male. I have been diagnosed with a vitamin B12 deficiency and have been taking medication for the past month. I experience slight pain on the left side of my chest and below it. My ECG results are normal.

Please advise.

Hello,

Welcome to icliniq.com.

Chest pain can be nonspecific; however, you should seek evaluation if the aches and pains occur all over the body or are concentrated in one specific group of muscles.

I hope that this answers your query.

Kindly follow up if you have more doubts.

Thank you.

Patient's Query

Hello doctor,

Thank you for the reply.

My vitamin B12 level was 154 pg/mL, and the other blood tests were normal. Before the diagnosis, I felt a suction sensation on the left side of my chest, but now, after treatment, it has improved. However, I still find it quite uncomfortable to sleep on my left side. This issue has improved after treatment, but it has not been completely resolved. I would like to know if all these symptoms are related to my vitamin B12 deficiency or if they indicate another problem.

Hello,

Welcome back to icliniq.com.

It seems that your pain is related to vitamin B12 deficiency, so you will need to replenish your B12 stores. I also suggest that you undergo a cardiac evaluation and recheck your B12 levels after six months of treatment.

I hope that this answers your query.

Kindly follow up if you have more doubts.

Thank you.

Patient's Query

Hello doctor,

Thank you for the reply.

I will follow your suggestion. However, how long does it generally take to correct B12 levels? I am vegan and have never smoked or drank alcohol. My BMI is 22.3.

Hello,

Welcome back to icliniq.com.

As a vegan, you are likely to have a vitamin B12 deficiency. You should check your vitamin B12 levels at least every six months. If you are receiving injections daily for a week, then weekly for a month, and monthly for six months, you should typically achieve optimal levels within a year. Your symptoms should resolve after about a month of therapy. Continue to monitor your levels regularly, as vitamin B12 deficiency can recur.

I hope this helps you.

Thank you.

Medically reviewed byDr. K. Shobana

Published At August 27, 2017
Reviewed AtDecember 1, 2025

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