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Vitamin B12 deficiency symptoms include numbness or tingling in the hands, legs, or feet, difficulty walking, anemia, swollen tongue, weakness, fatigue, and cognitive difficulties, including memory loss

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However, one common yet often overlooked reason for fatigue is a deficiency in vitamin B12

Benefits of subcutaneous administration include: Easier for patients to give themselves injections Less risk of muscle irritation Potential for slower absorption, depending on the injection site Intravenous (IV) Usage in Clinical Settings Intravenous Vitamin B12 is usually used for severe deficiency cases or when quick correction is needed