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For the full breakdown of the research, see our guide on whether B12 injections work for weight loss
Many patients notice improved energy levels and reduced fatigue within 12 weeks of starting intramuscular B12 injections
Clinical Chemistry (2014) 8
Unfortunately, our bodies do not produce this vitamin naturally and with age it becomes harder to absorb it, resulting in B12 deficiency, which is very common and can lead to neurological difficulties and anemia
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