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Feeling worse After My B12 Injection

Clean the injection site with an antiseptic

As for my injection site of choice, I chose the upper buttocks (gluteus medius) mainly because of the size of the muscle and the relative ease I have accessing it

But if you come back every week for a month or so you'll notice a big difference in your overall level of energy." So the very first time someone gets a B12 shot they probably won't feel much of an effect, even though they might experience a bit of an energy boost after the very first one, but it usually only lasts for about a week

Corrects deficiency-related fatigue and metabolic impairment

However, because B12 is stored in our livers, it might take a while for these deficiencies to show (Glass, 1959)