PlainPill
SupplementMoodEnergyAppetite

Vitamin B12 Injection

The short answer. There isn't much data on Vitamin B12 Injection yet — 3 mentions, 2 with a clear outcome — so treat these numbers as anecdotal. There is a moderate body of research — 1 meta-analyses and 3 trials.

Compare with…Alternatives for mood
What users report
50%helped2 reports · few reports
33% helped33% mixed0% didn't

Out of 3 mentions; the other 33% didn't say how it went and aren't counted.

Clinical research
BModerate research base
1
meta-analyses
3
RCTs
39
papers

What Vitamin B12 Injection does, according to users

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

Mood100% of 1Energy100% of 1Appetite0% of 1Pain & inflammation0% of 1
betterno changeworse

What the research says

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

BModerate research base

At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.

Cochrane Database Syst Rev · 2002 · Meta-analysis / systematic review
Acupuncture for lateral elbow pain

Conclusion: There is insufficient evidence to either support or refute the use of acupuncture (either needle or laser) in the treatment of lateral elbow pain. This review has demonstrated needle acupuncture to be of short term benefit with respect to pain, but this finding is based on the results of 2 small trials, the results of which were not able to be combined in meta-analysis. No benefit lasting more than 24 hours following treatment has been demonstrated. No trial assessed or commented on potential adverse effect. Further trials, utilising appropriate methods and adequate sample sizes, are needed be

PubMed 11869671 ↗

Dosage people report

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

1000 mcgalmost daily
1 mlas reported

Reported side effects

How often each side effect came up across all reports.

increased appetite ×1injection pain ×1

What users say

First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.

“It did give me some energy and increased mood. The pill form is extremely inefficient compared to injection.”
MixedRead the discussion ↗
“Worst subq injection I can think of would be shooting 1ml of that dark red B12. That hurts like a bee sting.”
Read the discussion ↗
Top discussions (3)

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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 3, 2026. How we rate