how long does b12 injection last Are Shots Safe? Royal Palm Beach Medical Group How Long Does a Vitamin

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Vitamin B12 is a powerhouse vitamin necessary for the proper functioning and development of brain cells, nerves, blood cells, and various other parts of the body

In clinic settings, emergency measures (like epinephrine and antihistamines) should be readily available in the rare event of an allergic reaction

The most common reason someone would need to have their vitamin B12 levels checked is to evaluate for vitamin B12 deficiency, says Mike Ren, MD, assistant professor of family and community medicine at Baylor College of Medicine

For example, those with Crohns disease or after gastric bypass might not absorb Vitamin B12 well