how long does it take vitamin b12 injection to work a Shot Last? how long does a vitamin
Description
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B12 (Cobalamin)
After the 1st shot, which I got in the left arm, I got an odd cool, numb, tingling feeling in the back of my head on the left side 2 hours post injection (in addition to chills, fatigue and low grade temp for a few days)
In fact, some observational studies suggest slightly lower fracture risk at high B12 blood levels
