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Some people notice the energy boost from B12 injections within a few hours
The therapeutic dose is 1 to 2 mg per day for a 70 kg adult
Possible side effects include mild irritation at the injection site, headaches, nausea, and others, depending on the specific peptide
As we age, our ability to absorb vitamin B12 may decline
And should you consider taking it
Prioritize protein: 0.8-1.0g per pound of body weight
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