Antibiotics if needed
B12 is water-soluble, so excess amounts are excreted naturally, making it very safe even in higher doses
Therefore, the first place you need to look when the benefits of a methyl-B12 shot seems to wear off too soon is to retry the shots at the same dose and frequency but make the angle of attack much more severe, much closer to the horizontal plane, just under the skin
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Serious Allergic Reactions: Rarely, vitamin B12 shots can cause anaphylactic shock, which can be life-threatening
Not everyone may feel confident doing this, and improper administration can lead to complications