Whilst in conventional medical practice B12 deficiency is generally treated with intramuscular injections, it is generally accepted that oral (per os) administration at a high dose is as effective at improving B12 status
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B12 injections for metabolism help your system function better, which may support digestion and calorie burn
Medicare Part B can cover medically necessary obesity counseling and nutrition therapy
This is because it is water-soluble, so most ingested B12 is actually flushed out in the urine