Nutrition
Vitamin B12 Status
Vitamin B12 status tracks a key nutrient for nerves and blood cells; low levels cause fatigue and neuropathy. Vegans, older adults, and some medications raise deficiency risk.
Vitamin B12 status reflects blood levels of a cofactor needed for nerves, red blood cells, and energy metabolism—low B12 causes fatigue, numbness, and elevated homocysteine in deficiency. Vegans, older adults, and people on certain meds need monitoring and fortified foods or supplements.
Absorption issues may need injections per clinicians.
Common questions
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Who should check vitamin B12 status?
Vegans, older adults, people on metformin or long-term PPIs, and anyone with unexplained fatigue or neuropathy symptoms should ask clinicians about serum B12 and related markers.
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Can you get enough B12 from plants alone?
Reliable B12 comes from fortified foods, supplements, or animal products—not unfortified plants. Do not rely on seaweed or spirulina as primary sources.
Related terms
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