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Status Not FDA-approved for any human use as of June 2026

According to Mayo Clinics drug and supplement reference, intramuscular B12 (the form used in MIXTs B12 injection protocols) is well-established for restoring B12 status quickly in clinically deficient patients and is often used when oral supplementation is poorly absorbed

It serves as a high-affinity reagent for the observation of fibroblast migration, nitric oxide (NO) synthesis modulation, and the biochemical pathways governing extracellular matrix (ECM) stabilisation in controlled laboratory environments

Whether through a nasal spray or injection, each delivery method has its own pros and cons