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Answer: Although sublingual B-12 — a form placed under the tongue and allowed to dissolve — is often promoted for better absorption, there does not appear to be much evidence for this.
Sublingual B12 supplements come in two forms: tablets and liquid drops. Whichever you decide on, the idea is to place the correct amount under your tongue and let it dissolve completely—without swallowing (UMichigan Health Library, 2018).
Sublingual vitamins, which are meant to be taken by dissolving the tab under your tongue, are growing in popularity. They work because the nutrient is absorbed under the tongue and enters...
Accordingly, sublingual B12 means the vitamin is absorbed through the tissue directly below your tongue. Your mouth is full of capillaries and absorbent tissue which are highly effective at picking up nutrients—more so than your digestive system.
Many people prefer a sublingual vitamin B12 supplement to an injection. Injections require you to draw up the medication and endure the mild pain associated with getting a shot. Taking vitamin B12 sublingually, by contrast, is as simple as placing a quick-dissolving tablet under the tongue.
Substances absorbed under the tongue get into the bloodstream without having to go through the gastrointestinal tract. You're not supposed to swallow while a B-12 tablet is dissolving under your tongue, otherwise the vitamin ends up in your stomach and defeats the purpose.
The way to take a sublingual tablet is simply to just put the pill under your tongue and wait, but making sure there is enough saliva under the tongue certainly helps it dissolve faster… some people even rotate it around the bottom of their mouth to keep the saliva flowing over it.
They need to know if you have any of these conditions: Leber's disease. Low amounts of iron or folic acid in your blood. Megaloblastic anemia. An unusual or allergic reaction to vitamin B12, cobalt, other medications, foods, dyes, or preservatives. Pregnant or trying to get pregnant. Breast-feeding.
Vitamin B-12 can be taken sublingually -- that is, with a pill placed under the tongue and then allowed to dissolve. According to the National Institutes of Health, there is no evidence that sublingual forms of B-12 are absorbed more efficiently than any other forms.
Sublingual B12 tablets are specially formulated tablets which are placed under the tongue and held there until they fully dissolve. As the tablet dissolves in the saliva, the mixture is absorbed through the tissues of the cheeks, palate and under the tongue.