PlainPill

Methylcobalamin

People mainly take Methylcobalamin for energy, mood, anxiety. Based on 32 first-hand reports and 19 meta-analyses & systematic reviews in the medical literature. Ranked #134 of 1,974 overall.

48
User score
Mixed
28% positive19% mixed9% negative44% unclear

Of reports that state an outcome, 50% are positive.

Clinical research
AStrong research base
19
meta-analyses
65
RCTs
967
papers

What Methylcobalamin does, according to users

Of the people who reported each effect, the share who said it got better.

2 more with fewer than 3 reports
betterno changeworse

What the research says

Systematic reviews and meta-analyses from PubMed, with their published conclusions.

AStrong research base

3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.

Nutrients · 2020 · Meta-analysis / systematic review
B12 as a Treatment for Peripheral Neuropathic Pain: A Systematic Review

Conclusion: Twenty four published articles were eligible for inclusion in this systematic review in which a range of treatment regimens were evaluated including both B12 monotherapy and B12 in combination with other vitamins or conventional treatments, such as gabapentinoids. Overall, this systematic review demonstrates that there is currently some evidence for the therapeutic effect of B12 in the treatment of post-herpetic neuralgia (level II evidence) and the treatment of painful peripheral neuropathy (level III evidence).

PubMed 32722436 ↗
J Altern Complement Med · 2020 · Meta-analysis / systematic review
Efficacy and Safety of Mecobalamin on Peripheral Neuropathy: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Conclusion: Conclusion: Our findings indicate that mecobalamin in combination may be effective in improving clinical therapeutic efficacy and NCV outcomes for peripheral neuropathy patients, but the evidence is not clear for mecobalamin alone. More high-quality studies are required to confirm this finding.

PubMed 32716261 ↗

Dosage people report

As stated by users — not a recommendation. Follow the label or your doctor.

100 mg2x/week
around 7pmas reported
1500 mcgdaily
once weeklyas reported
dailyas reported
33,000% DV (~330,000 mcg estimated)almost daily for 7 months

Reported side effects

How often each side effect came up across all reports.

anxiety ×3jitteriness ×2fatigue ×2weakness ×2dehydration ×1drowsiness ×1headache ×1acne ×1

What users say

Verbatim quotes, shortened only — each links to the original discussion.

Other options for energy

User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate