Administering the Injection Choose the Injection Site : IM Injection Sites : Common sites include the deltoid muscle (upper arm), gluteus maximus (buttocks), and vastus lateralis (thigh)
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oral vitamin B12 replacement When offering oral vitamin B 12 replacement to people with vitamin B 12 deficiency caused, or suspected to be caused, by malabsorption, prescribe a dosage of at least 1 mg a day
When this occurs, they may need supplements or B12 shots
Based on available information, adverse effects appear mild in most users, but the lack of long-term human data means caution is warranted
10.1073/pnas.2506321122 32 TaoZ.Le Blanc JustinM.WangC.ZhanT.ZhuangH.WangP.et al (2016)