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Vitamins · Ingredient profile
Vitamin B12
Nerves, red blood cells & DNA
B12 supports nerve function, DNA synthesis, and red blood cell formation. People eating no animal foods or with absorption difficulties may need particular attention to intake.
The essentials
Functions & potential benefits
- Supports red blood cell formation.
- Contributes to nerve function.
- Helps the body make DNA.
Everyday nutrition
Where it comes from.
Fish, meat, eggs, dairy foods, and B12-fortified plant foods.
Read the NIH reference ↗Evidence, in perspective
Know the limits.
B12 can help when intake or absorption is inadequate. Extra B12 does not reliably increase energy when status is sufficient.
Read the NIH reference ↗Important considerations
Before choosing a supplement.
Metformin and acid-reducing medicines can affect B12 status. Persistent fatigue, tingling, or numbness should be medically assessed.
Read the NIH reference ↗Ingredient education—not a product claim. This describes the ingredient, not a verified Herbs To Discover formula. Supplement Facts, serving amounts, directions, certifications, and availability are not yet published. Source review date 2026-09-15. Read the NIH reference ↗ · Editorial approach.