The deltoid may work well for a person with developed muscles in the upper body
In summary, monitor the injection site (if pain increases or the area gets very red, hot, and swollen, inform your doctor as that could indicate injection-site infection, which is exceedingly rare with proper technique)
The body stores some B12 in the liver, but excess amounts are flushed out of the body through urine
When adverse effects occurred, they were typically mild and transient, with the most common being mild to moderate headaches (similar frequency to placebo groups), minor injection site reactions (redness, slight swelling), and gastrointestinal effects at higher oral doses (nausea, diarrhea)
who may need a Vitamin B12 Injection