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Empty the syringe by pushing the plunger
B12 shots supply vitamin B12 as methylcobalamin or cyanocobalamin, typically given intramuscularly into the deltoid, supporting red blood cell formation, myelin and nervous system health, and the metabolism of homocysteine, a process that can falter with vegan diets, malabsorption, or medications like metformin
Long-term effects beyond this window remain largely unknown
Always fast and efficient
For non-emergency concerns such as persistent injection site reactions or new neurological symptoms, contact your GP or NHS 111
With such sufficient consumption, factors such as gastritis, antacid drugs, ageing stomach changes and gut surgery would still prevent your body from utilising B12, leading to fatigue and lack of energy
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