The vitamin B12 supplement I take is sublingual.
The instructions say to place the pill under your tongue and let it dissolve.
Most times, I forget and let it dissolve on top of my tongue. Am I not getting any B12 when I do this?
— Kate (last name withheld)
No need to worry.
When it comes to B12, it has been theorized sublingual doses are optimal since they are absorbed through the oral mucosa (rather than having to go through the gastrointestinal tract).
One of the supposed “advantages” is faster absorption, though I can’t fathom why absorbing vitamin B12 immediately is better to absorbing it in a matter of hours.
In any case, a study published in the 2003 issue of the British Journal of Clinical Pharmacology compared the efficacy of sublingual versus standard oral vitamin B12 supplements and found they both did the job equally well.