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Potential side effects include hives and allergic reactions
B12 deficiency can affect memory and cognitive function, leading to difficulties in concentration and mood changes
Downtime and recovery You can return to work or errands right away
To make sure this medicine is safe for you, tell your doctor if you have: eye problems or Leber's disease (in you or a family member)
A good rule of thumb is to supplement if your B12 levels are lower than 500 (read this article to understand why)
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