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Side effects are rare and usually mild
However, some people cannot take vitamin B12 injections safely, including those with Lebers disease or similar eye concerns, kidney disease, liver disease, iron or folic acid deficiency, an active infection, or those taking medications that may interact with vitamin B12
Vitamin B12 injections are like hitting a reset button for these processes and can provide an immediate energy boost
Resistance training helps preserve the muscle that keeps metabolism healthy, and steady protein intake supports that muscle, so the peptide becomes one part of a sustainable approach
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M., & British Committee for Standards in Haematology
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