OptimalNourish

Form comparison

Vitamin B12: Capsule vs Sublingual

Is Vitamin B12 better in capsule or sublingual form?

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

Capsule

Gelatin or veggie shell holding powder. Standard release; easy to dose precisely.

Absorption:
standard
Convenience:
high
Shelf life:
long

Pros

  • Precise per-dose amount
  • Travel-friendly
  • Neutral taste
  • Long shelf life

Cons

  • Slower onset than liquids
  • Can be hard to swallow for some

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
See all Vitamin B12 forms

Other Vitamin B12 comparisons

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