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(2003) Oral versus intramuscular cobalamin treatment in megaloblastic anemia: a single-center, prospective, randomized, open-label study
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Your lab results tell a story
in others, the picture is less clear
Also look for a company which sells "prescription-grade" vitamin B12, and any other supplements they sell on the site
Common symptoms can include: Extreme fatigue Lethargy Loss of appetite headaches Feeling faint or dizzy Breathlessness Headaches Heart palpitations Tinnitus Additional symptoms of B12 deficiency can include psychological problems such as low mood, irritability, depression, cognitive changes, or blurred memory
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