Signs and symptoms of vitamin B12 deficiency can include fatigue, pale skin, headaches, shortness of breath, fast heartbeat, gastrointestinal issues, mouth inflammation, paresthesias (abnormal sensations), decreased cognitive ability, depression, muscle weakness, imbalance and incoordination, vision problems, and erectile dysfunction
Initial research tested doses as low as 250mcg and as high as 1mg daily
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If you have a severe medical condition or health concern, see your physician
Retrieved from [13] Obeid R, Holzgreve W, Pietrzik K
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