Supplement reference
Vitamin B12 (Methylcobalamin)
A source-linked reference on Vitamin B12 (Methylcobalamin), evidence, safety and product identity. Sources checked 6 September 2026.
Source and review status
Published sources checked
Sources checked on: 6 September 2026
Qualified clinical review: Pending. This page has not been clinically reviewed.
About this source check
AI-assisted editorial source checking covers the cited material and its stated limits. It is not a systematic review, verification of a supplied product, or clinical sign-off.
Editorial role: InfoAddict. Last material change: 6 September 2026. Next source review: 6 March 2027.
Ingredient and preparation
Methylcobalamin is one supplemental vitamin B12 form. NIH states that research has not shown one supplemental form to be better than others.
Sources: National Institutes of Health, Office of Dietary Supplements
Evidence and limits
Vitamin B12 helps maintain blood and nerve cells and helps prevent megaloblastic anaemia. Those functions do not mean B12 improves energy or cognition in people who are already replete.
Sources: National Institutes of Health, Office of Dietary Supplements
Safety and a useful record
B12 status can be tested, and some medicines can affect absorption. Bring test context and medicines to a clinician rather than inferring deficiency from fatigue alone.
Sources: National Institutes of Health, Office of Dietary Supplements, National Center for Complementary and Integrative Health
Record form, label amount, test date, reference range and other B12-containing products.
Sources: National Center for Complementary and Integrative Health
Published sources
- Vitamin B12: Fact Sheet for Consumers
National Institutes of Health, Office of Dietary Supplements. Updated 15 December 2023; accessed 6 September 2026.
Supports: Vitamin B12 functions, absorption and deficiency context. It does not establish methylcobalamin as superior to other forms.
- Safe Use of Complementary Health Products and Practices
National Center for Complementary and Integrative Health. Current NCCIH reference; accessed 6 September 2026.
Supports: General safety, interaction and contamination context. It does not establish ingredient-specific benefit.
Change history
| Date | Change | Clinical-review status |
|---|---|---|
| 6 September 2026 | Source-linked reference published | Pending |
Keep a private record
UpgradeYourself lets you keep private records of routines and observations you choose to discuss with a qualified health professional. This reference does not recommend starting, stopping or changing an item.