can you have an allergic reaction to b12 injection Shots at Home: How, Where & How Often Inject Yourself Allergic Reaction to B12 |

The effects of a vitamin B12 shot usually last between 48 and 72 hours after the injection, but since each body is different, the duration may vary

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The NHS lists other symptoms of vitamin B12 deficiency to look out for: A pale yellow tinge to your skin A sore and red tongue (glossitis) Mouth ulcers Pins and needles (paraesthesia) Changes in the way that you walk and move around Disturbed vision Irritability Depression Changes in the way you think, feel and behave A decline in your mental abilities, such as memory, understanding and Judgement (dementia) DON'T MISS If you experience these symptoms, see a GP

Instead, its activity is associated with adrenergic receptorlinked pathways in adipocytes