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Symptoms associated with B12 deficiency may include: Persistent fatigue or weakness Memory impairment or confusion Nerve-related issues such as numbness or tingling Mood fluctuations or depression Pale or yellowish skin A B12 deficiency can affect anyone, but older adults are particularly vulnerable
Instead of overcoming the metabolic adaptation, higher doses frequently exacerbate side effects like nausea, fatigue, and gastrointestinal distress
(2006, February)
typically resolves within hours [4] [6]
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