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PSA: Be wary if a healthcare pro recommends B12 shots without assessing your B12 levels first
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Keep a simple log of injection sites to ensure adequate rotation
The Professional Compounding Centers of America (PCCA) and similar organizations maintain reference standards, but compliance is voluntary [8]
The participants included folks with cancer, liver disease, kidney diseases, and who were older adults and critically ill
10.1038/nri2925 Nat Rev Immunol
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