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Tightness in the throat and chest can occur with B12 deficiency and it is commonly mislabelled as anxiety. The mechanism is neurological and autonomic, not psychological. Here is the clear biology you Can Vitamin B12 Help Clear the Brain Fog and Fatigue of Long COVID and ME CFS? RTHM Vitamin B12 Deficiency & Nerve Problems : What You Must Know Autonomic Nervous System Anatomy: Overview, Gross Anatomy, Cardiac and Vascular Regulation Parasympathetic and Sympathetic Nervous System Dysfunction and Monitoring Springer Nature Link Current Nanocarrier Strategies Improve Vitamin B12 Pharmacokinetics, Ameliorate Patients' Lives, and Reduce Costs
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