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the claim

Vitamin B12 deficiency can lead to megaloblastic anemia, nerve degeneration, and irreversible neurological damage.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
7 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that vitamin B12 deficiency can lead to megaloblastic anemia, nerve degeneration, and irreversible neurological damage?

Yes. Vitamin B12 deficiency is well established to cause megaloblastic anemia, peripheral neuropathy, and potentially irreversible neurological damage such as subacute combined degeneration of the spinal cord.

Verdict: SUPPORTED · 7 sources for, 0 against · Last checked

The analysis

Multiple clinical case reports, reviews, and diagnostic studies consistently confirm that vitamin B12 deficiency leads to megaloblastic anemia and severe neurological complications, some of which can be irreversible if not treated promptly. There are no papers contradicting this well-established pathophysiological relationship.

Evidence for · 7
Megaloblastic anemia due to severe vitamin B12 deficiency
2022
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Candelario, N. & Klein, C. (2022). Megaloblastic anemia due to severe vitamin B12 deficiency. doi.org. https://doi.org/10.3949/ccjm.89a.21041

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More for · 6
Comparing Holotranscobalamin and Total Vitamin B12 in Diagnosing Vitamin B12 Deficiency in Megaloblastic Anemia Patients
2024
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Tufail, N., Kataria, M., Chaudhary, A., Dhillon, R., Naveed, M. A., & Mohsin, S. (2024). Comparing Holotranscobalamin and Total Vitamin B12 in Diagnosing Vitamin B12 Deficiency in Megaloblastic Anemia Patients. doi.org. https://doi.org/10.7759/cureus.71278

Tropical Sprue: A Rare Cause of Malabsorption Syndrome
2024
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Costa, C., Matos, F. B., Sá, D. C., & Maia, J. N. (2024). Tropical Sprue: A Rare Cause of Malabsorption Syndrome. doi.org. https://doi.org/10.7759/cureus.53748

Inherited disorders of cobalamin metabolism in childhood: biochemical and clinical perspectives.
2026
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AG, S., PK, G., & AN, P. (2026). Inherited disorders of cobalamin metabolism in childhood: biochemical and clinical perspectives.. doi.org. https://doi.org/10.3389/fnut.2026.1808765

Insights Into Subacute Combined Degeneration of the Cord: 'Rabbit Ear Sign' as a Radiodiagnostic Clue in Case of Vitamin B12 Deficiency Associated With Schizophrenia.
2026
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M, H., M, H., A, N., S, I., A, N., MA, M., W, K., N, S., R, N., T, A., & I, F. (2026). Insights Into Subacute Combined Degeneration of the Cord: 'Rabbit Ear Sign' as a Radiodiagnostic Clue in Case of Vitamin B12 Deficiency Associated With Schizophrenia.. doi.org. https://doi.org/10.1155/crnm/5583285

Pernicious Anemia Mimicking Thrombotic Thrombocytopenic Purpura in the Setting of Severe Vitamin B12 Deficiency.
2026
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CN, H., H, M., SP, S., & M, M. (2026). Pernicious Anemia Mimicking Thrombotic Thrombocytopenic Purpura in the Setting of Severe Vitamin B12 Deficiency.. doi.org. https://doi.org/10.7759/cureus.113023

Nitrous Oxide-Induced Pancytopenia and Peripheral Neuropathy From Chronic Whip-It™ Use: A Case Report.
2026
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S, P., S, G., S, D., SS, M. V., & B, H. (2026). Nitrous Oxide-Induced Pancytopenia and Peripheral Neuropathy From Chronic Whip-It™ Use: A Case Report.. doi.org. https://doi.org/10.7759/cureus.112883

What does the evidence say?

Multiple clinical case reports, reviews, and diagnostic studies consistently confirm that vitamin B12 deficiency leads to megaloblastic anemia and severe neurological complications, some of which can be irreversible if not treated promptly. There are no papers contradicting this well-established pathophysiological relationship.

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