Can taking 5000 mcg daily of vitamin B12 cause cancer?

Answered by 1 Apollo Doctors

Dr Yusuf Mohammad

General Practitioner

MBBS
Advanced Certificate Course in Dermatology
8+ Yrs

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No, it doesnt cause cancer but elevated levels can put you at a risk of cancer

Dr. Yusuf Suggests...

Take a Anti Ds DNA test Test or Take a APOLIPOPROTEIN EVALUATION PANEL WITH LIPOPROTEIN A Test

Book Anti Ds DNA test Test Book APOLIPOPROTEIN EVALUATION PANEL WITH LIPOPROTEIN A Test

Answered 24/07/2025

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Why shouldn't you give folate in patients with a B12 deficiency?

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Why shouldn't let your Vitamin B12 levels drop?

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I have been suffering from recurrent oral ulcers since December. Currently, only two marks remain. I have consulted a dentist, general physician, and ENT surgeon. All said these are aphthous ulcers. Blood tests are normal, and biopsy was not recommended. My Vitamin B12 is now 271 after taking B12 injections and Rinifol. There is no pain like before, but the ulcers persist. What can I do to get rid of this problem permanently?

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