Best form of vitamin b12.
Forms guide ·4 forms compared ·Reviewed May 2026
For most people, Methylcobalamin is the vitamin b12 form to reach for (methylation support or mthfr-focused protocols). Cyanocobalamin is the most budget-friendly option. Hydroxocobalamin suits injection protocols or longer tissue retention. There is no single best form for everyone; the right pick depends on your goal, how well you absorb it, and your budget.
The short answer.
A quick, honest verdict. The full side-by-side, with typical doses, is below.
For most people, Methylcobalamin is the vitamin b12 form to reach for (methylation support or mthfr-focused protocols). Cyanocobalamin is the most budget-friendly option. Hydroxocobalamin suits injection protocols or longer tissue retention. There is no single best form for everyone; the right pick depends on your goal, how well you absorb it, and your budget.
Every form, compared.
Best use, cost tier, and a typical adult dose for each form. The best-for-most pick is a sensible default, not the only good choice.
| Form | Best for | Cost | Typical dose |
|---|---|---|---|
| Cyanocobalamin | General maintenance on a budget | Budget | 500-1000 mcg/day |
| MethylcobalaminBest for most | Methylation support or MTHFR-focused protocols | Mid | 1000 mcg/day |
| Hydroxocobalamin | Injection protocols or longer tissue retention | Premium | 1000 mcg as directed |
| Adenosylcobalamin | Mitochondrial support and combination B12 protocols | Premium | 1000 mcg/day |
Full vitamin b12 profiles.
Each profile has the evidence, dosing by goal, interactions, and cited sources.
Common vitamin b12 questions.
Quick answers, drawn from the comparison above.
What is the best form of vitamin b12?
Methylcobalamin is the best vitamin b12 form for most people (methylation support or mthfr-focused protocols). The right form still depends on your goal, absorption, and budget; see the full comparison for the alternatives.
What is the cheapest form of vitamin b12?
Cyanocobalamin is the most budget-friendly form, typically a budget-tier option, with a typical dose of 500-1000 mcg/day.
How many forms of vitamin b12 are there?
NutriStack compares 4 commonly sold forms of vitamin b12: Cyanocobalamin, Methylcobalamin, Hydroxocobalamin, Adenosylcobalamin.
Pick a form, then build your stack
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