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Potential concerns include: Unknown product quality Contamination or sterility issues Incorrect dosing Injection site reactions Allergic or immune reactions Medication interactions Hormonal or metabolic effects Unclear long-term safety Lack of monitoring Delayed treatment for an actual injury or medical condition Medical oversight is especially important for patients with autoimmune conditions, cancer history, active infections, chronic inflammatory disorders, cardiovascular concerns, hormone-sensitive conditions, or complex medication regimens
B12 injections tend to be reserved for those who are deficient
The side effects of B12 shots vs IV infusions differ primarily in injection site reactions and systemic risks
ESPEN , 23 , 4853
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