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Form comparison

Vitamin B12: Sublingual vs Tablet

Is Vitamin B12 better in sublingual or tablet form?

For most people, sublingual is the better way to take Vitamin B12. Sublingual offers fast absorption and high convenience, while tablet trades some of that for cheapest per dose.

Sublingual

Most recommended

Dissolves under the tongue. Bypasses initial digestion for select compounds (e.g. B12, melatonin).

Absorption:
fast
Convenience:
high
Shelf life:
medium

Absorption: Dissolving under the tongue bypasses absorption issues in older adults and those on metformin.

Best for: older adultsBest for: low B12 status

Pros

  • Fast onset
  • Useful when digestion is a concern

Cons

  • Limited compounds suit this format
  • Hold under tongue for full minute
  • Hold under tongue for at least 60 seconds

Tablet

Compressed powder, sometimes coated. Cheapest format per dose.

Absorption:
standard
Convenience:
high
Shelf life:
long

Pros

  • Cheapest per dose
  • Long shelf life
  • Often scored to split

Cons

  • Binders and coatings vary by brand
  • Slower disintegration
See all Vitamin B12 forms

Other Vitamin B12 comparisons

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