Dissolved under your tongue, this **B-12** delivers a full 2,000 mcg, well within the 250–5,000 mcg range supplements use to restore and maintain healthy B12 levels for energy, nerve function, and red blood cell production. That dose is split between **methylcobalamin** and **adenosylcobalamin**, the two forms your body uses directly, so nothing has to be converted first.
What sets this apart is the sublingual micro-tablet: it dissolves on or under your tongue rather than relying on stomach absorption — useful if you're an older adult, take metformin or acid-reducers, or have low intrinsic factor. B12 matters most for vegans and vegetarians, since it comes almost entirely from animal foods.
At a dose this high, swallowed B12 absorbs well through passive uptake too, so the sublingual format is mainly an edge for those with poor absorption. B12 is water-soluble with no upper limit — your body clears whatever it doesn't use.
BioStacks
Other Ingredients (6)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Natural FlavorsFlavor
Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Citric AcidAcidulant
Natural acid derived from citrus fruits
StarchBinder
Carbohydrate polymer used as a binder, filler, and disintegrant in tablets and capsules
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.