B12 deficiency is common in low-animal diets, older adults, and people on acid reducers or metformin. Methylcobalamin and cyanocobalamin both raise status; the methyl form is fashionable, the blood test is what matters.
Supplements
Strong evidence
Methylcobalamin (B12)
The B12 form vegans and metformin users actually need to check.
How to use
500–1000 mcg daily if diet is low, then re-test. Sublingual is optional theater for most people.
Details
- Ingredients
- Methylcobalamin
- Benefits
- B12 repletion, Nerve and blood-cell support
- Dosage
- 500–1000 mcg oral
- When to take
- Morning
- Side effects
- Rare acne or palpitations at high dose. Injection is a medical decision.
- Scientific evidence
- B12 deficiency treatment is textbook medicine; supplemental form wars are mostly marketing.
- Form
- Capsule
- Third-party tested
- Yes
Editorial rating ★ 4.6
If you do not eat animal food, this is not optional. Confirm with labs when symptoms are real.
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