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Those who did not receive enough were associated with a much higher risk for obesity
They're like tiny messengers that tell your cells what to do
These injections are quick, virtually painless, and deliver B12 directly into the bloodstream, bypassing the digestive system for maximum absorption
Learn where to self-administer a B12 shot and how to do it painlessly This article was medically reviewed by Shari Forschen, NP, MA and by wikiHow staff writer, Amber Crain
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