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In this guide, we'll break down exactly how long the effects last, how quickly a shot kicks in, how often you can get one, and the personal factors that shape your results
Because these factors stack together, two people can get the same shot and feel it for different lengths of time
High doses may put additional strain on the kidneys, potentially causing adverse effects
For those with no known deficiencies or contraindications, vitamin B12 shots are often considered unnecessary and may not provide additional benefits
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