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Vitamin B12 Injections vs. Supplements: Which Works Best? B12 Injections at Olympia The sublingual B12 pitch is almost always wrong. The mucosa under your tongue has essentially zero capacity to absorb vitamin B12. There are no specialized transporters there. The tablet dissolves in your Frontiers Efficacy of sublingual and oral vitamin B12 versus intramuscular administration: insights from a systematic review and meta analysis Can I start intramuscular vitamin B12 therapy and later switch to oral supplementation?
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