does a b12 injection make you tired can vitamin injections Vitamin B12 injections have been around for years but Why do I feel worse
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the lyophilized powder is resistant to degradation at room temperature for up to 3 weeks during transit

Mar 11 2021;22(6)doi:10.3390/ijms22062834 Man AWC, Li H, Xia N

Serious Allergic Reactions: Rarely, vitamin B12 shots can cause anaphylactic shock, which can be life-threatening

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