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Patients should consult their GP for appropriate B12 testing and treatment, avoiding unregulated sources due to risks of contamination, incorrect dosing, and delayed diagnosis of underlying conditions
Injections are typically given intramuscularly (into a muscle) or subcutaneously (under the skin)
Use sterile needles and medical-grade B12 solutions
Symptoms of B12 deficiency include exhaustion no matter how much you sleep, muscle weakness and frequent cramping, constipation, loss of appetite and unexplained weight loss, numbness or tingling in the hands and feet, depression, and problems with memory and focus
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