Vitamin B12 deficiency
Low B12 causing anemia and, if prolonged, nerve damage.
Prevention
Adequate dietary B12 or supplementation (especially for vegans and older adults).
Prognosis
Reversible if treated before permanent nerve injury.
Informational only — not medical advice.
Body systems
Research (8)
- Vitamin B12 Deficiency: An Under-Addressed Community Health Problem Dhochak et al. (2025) Full text ↗ PubMed ↗
- Late Life Vitamin B12 Deficiency Zik (2019) Full text ↗ PubMed ↗
- Investigating vitamin B12 deficiency Sukumar et al. (2019) Full text ↗ PubMed ↗
- Vitamin B12 deficiency Hunt et al. (2014) Full text ↗ PubMed ↗
- Vitamin B12 deficiency Stabler (2013) Full text ↗ PubMed ↗
- Vitamin B12 deficiency Abboud et al. (2013) Full text ↗ PubMed ↗
- Clinical practice. Vitamin B12 deficiency Stabler (2013) Full text ↗ PubMed ↗
- The clinical potential of ademetionine (S-adenosylmethionine) in neurological disorders Reynolds et al. (1994) Full text ↗ PubMed ↗
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