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b12 injection increased heart rate Benefits of Injections for Optimal Health What Causes B12 Side Effects?
Description
Certain people are at greater risk for deficiency because of things like diet, lifestyle, and prescription medications

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The maximum approved dose produces the greatest weight loss in clinical trials but also the highest side effect incidence

Medically reviewed by Lauren Okafor | MD , The Frank H Netter MD School of Medicine, Loyola University Medical Center on March 12th, 2026
