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If you have a health problem that requires you to take vitamin B12 sublingually, it is unlikely that swallowing the same dose will be effective. Vitamin B12 requires the presence of intrinsic factor for proper digestion in the stomach. That's why it's given IM or SL instead in most cases of deficiency.
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Earn +20 ptsQ: Is a sublingual vitamin b12 pill still effective if swallowed whole?
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