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Methylcobalamin is the bioactive form of B12 and does not require conversion

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Dizziness or Lightheadedness: In rare cases, individuals may experience dizziness or lightheadedness after receiving a B12 injection

Weight-based calculations

The peer-reviewed literature is also concentrated within a single research group (Watowich lab, University of Texas at Austin) and its industry partner Ridgeline Therapeutics, with limited independent replication to date