b12 injection makes me sleepy When Do You Feel Less Tired After Shot? How Soon Do You Feel

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High levels of B12, or hypercobalaminemia, can be a sign of tissue breakdown, which releases B12 back into the bloodstream

Different B vitamins help in various ways to repair nerves

Gentle movement is fine and can help circulation, but heavy lifting, vigorous upperbody workouts, or repetitive strain at the injection site can increase blood flow and make bruises larger or soreness last longer