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141 The active form of this vitamin in patients with functional transcobalamin II and normal B 12 cell metabolism can inhibit production of this biomarker by indirect mechanisms, that is, through downregulation of NFB levels and increased acetylcholine synthesis, which positively modulates the neuro-immune cholinergic anti-inflammatory pathway

intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficiency", Drug Delivery And Translational Research

The MHRA opened investigations in April 2026 into UK clinics doing exactly this kind of marketing

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