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)
The body stores some B12 in the liver, but excess amounts are flushed out of the body through urine
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Promotes Healthy Nerve Function Adequate levels of vitamin B12 support the health of the nervous system, aiding in the production of nerve cells and protective myelin
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)
B12 is used to initially treat B12 deficiency and anaemia