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B12 for Mood and Mental Clarity Low levels of vitamin B12 are often associated with: Brain fog Mood swings Irritability or even depression Restoring your B12 levels, you may experience improved mental clarity and emotional stability , especially if you're already feeling off your game
Some people notice the energy boost from B12 injections within a few hours
Megaloblastic anemia due to vitamin B12 deficiency A fast heart rate may be a symptom of vitamin B12 deficiency
The MHRA Drug Safety Update (2022) highlights this association and recommends considering periodic monitoring in at-risk patients
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