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giving a b12 injection where do you administer injections How to Give B12 Injections at Home to Yourself Best Vitamin B12 Injection Sites:
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Anyway, for ease of self-injecting we recommend the belly and other places for your B12 shots, such as How to inject vitamin B12 into your belly

An alcohol swab should be used to clean the injection site (usually your thigh, abdomen, or upper arm)

Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity

2013;8(8, article e71272) doi: 10.1371/journal.pone.0071272

Acknowledgments This study is supported by the National Natural Science Foundation of China (NSFC 21365013) and the Key Lab of Aquatic Training Monitoring and Intervention of General Administration of Sport of China (no