Evidence
1 record1 recordBest grade:High
Research shows that B12 supplementation effectively corrects deficiencies and improves energy and neurological symptoms in at-risk populations. While evidence is strong for its benefits, individual responses may vary, and monitoring levels is advisable.
B12 status / neurological functionDeficient adults; vegans; older adults · RCTs + observationalHigh
B12 status / neurological function
Deficient adults; vegans; older adults · RCTs + observational
Reliably corrects deficiency; improves energy & neurological symptoms in deficient individuals.
Dose: 1 mgDuration: 8–12 weeks
No established benefit in non-deficient adults; high oral doses (1000 mcg) compensate for poor absorption.
Stacks containing Vitamin B12
Explore all →No public stacks include this supplement yet.
Community Insights
Forms & usage▾
How to take it
Take 250-1000 mcg daily, preferably in sublingual or liquid form for better absorption.
Methylcobalamin
Active form; preferred by some.
Cyanocobalamin
Most studied; highly stable.
Hydroxocobalamin
Long-acting injection form.
Safety & trade-offs1▾
Note
Cyanocobalamin releases trace cyanide on metabolism — methylcobalamin preferred for those with MTHFR variants or very high-dose supplementation
●High ●Moderate ● Low / note
My notes▾
Sign in to keep a private note on Vitamin B12.