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Difficulty with Memory or Concentration Vitamin B12 deficiency may affect brain function and contribute to difficulty with memory, focus, or concentration
Related questions What does high B12 mean in a blood test
In general, once opened, reagents should be used within three months, while the recommended shelf life for unopened reagents is one year
Summary: High vitamin B12 levels rarely cause direct symptoms
Additionally, individuals taking medications that may interact with B12, including metformin or proton pump inhibitors, should consult a healthcare provider before starting supplementation
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