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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

Table 1: Patient Risk Factors Associated with B 12 Deficiency Bold represents factors associated with more rapid onset of clinical symptoms i.e., within 5 years

It helps prevent a type of anemia called megaloblastic anemia, also known as vitamin B12 deficiency anemia, which results in symptoms like chronic fatigue and weakness