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b12 where to inject How self-inject intramuscular vitamin - Overview B12 INJECTIONS - The Nurse
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Importantly, it achieves these effects without impacting blood sugar levels or insulin sensitivity

B12 supports normal energy metabolism and red blood cell production, so correcting a genuine deficiency can help you feel and perform like yourself again, but shots are not a proven performance enhancer for people who are not deficient

[DOI] [PubMed] [Google Scholar] 202

In the United States, injectable B12 is technically a prescription medication

The side effect profiles differ slightly between the two medications
