Health
B12: The Vitamin Most Plant-Based Eaters Are Missing
~1 min read
Top Health #2Week of 2026-04-06
Reviewed by Younghun ChoLast reviewed April 12, 2026
Possible driver: Growing interest in plant-based diets
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The 1-Minute Read
medium confidenceVitamin B12 (cobalamin) is a water-soluble vitamin critical for nerve function, DNA synthesis, and red blood cell formation [0]. It has been trending as more people explore plant-based diets, which naturally lack B12 sources. Vegetarians, vegans, and adults over 50 are at higher risk of deficiency because absorption decreases with age and the vitamin is found primarily in animal products. Current evidence supports supplementation for at-risk groups, with both cyanocobalamin and methylcobalamin forms being effective. The recommended daily intake is 2.4 mcg for most adults. Signs of deficiency include fatigue, weakness, numbness, and cognitive difficulties. If you suspect a deficiency, a simple blood test can confirm it. Most over-the-counter B12 supplements are safe and well-tolerated, but consulting a pharmacist about the right dosage for your situation is always recommended.
Key Takeaways
- B12 is essential for nerve and blood cell health [0]
- Vegetarians and adults over 50 are most at risk
- Both cyanocobalamin and methylcobalamin forms work
- Recommended daily intake: 2.4 mcg for most adults
Safety Information
See a doctor if…
- Numbness or tingling in hands and feet
- Severe fatigue that does not improve with rest
- Difficulty walking or balance problems
People Ask Next
Sources
Primary Sources
- [0]Evidence-based review article
PubMed Review, 2024
What We Don't Know Yet
- Limited data on optimal dosing for different populations