Vitamin B12 Sublingual
The short answer. There isn't much data on Vitamin B12 Sublingual yet — 3 mentions, 2 with a clear outcome — so treat these numbers as anecdotal.
From 3 mentions in total — the rest didn't say how it went and aren't counted.
What Vitamin B12 Sublingual does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“9 months ago my doctor informed me of a B12 deficiency and instructed i take 1000 mcg's of sublingual B12 every day. A recent blood test indicated that I now have over double the normal amount of B12 in my system.”
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 3, 2026. How we rate