what happens if you have too much b12 injections Vitamin Injections: Good or Bad? Are B12 Shots Safe? Royal

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Patients with pernicious anaemia, malabsorption disorders (such as Crohn's disease or coeliac disease), or following gastric surgery require regular B12 supplementation to prevent serious complications including megaloblastic anaemia and neurological damage

Vertigo is a feeling of spinning

High doses are often injected at long intervals to keep costs down

Extra energy and diminished appetite

The most important factor is consistency of timing and route day to day, since the mechanism works cumulatively rather than as an acute event to time around a meal