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The thigh, buttocks, or upper arm are the best spots due to their muscle depth and ease of access
John DiBella Published: November 3, 2025 Fact-checked by Dr
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An alcohol swab should be used to clean the injection site (usually your thigh, abdomen, or upper arm)
Symptoms can include fatigue, weakness, memory loss, and neurological changes
Those who cannot absorb vitamin B12 through their gastrointestinal tract are typically prescribed B12 injections
Assemble Your Injection Device: If you're using a syringe and vial, remove the caps and, using a new needle, draw air into the syringe equal to your dose
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