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Symptoms can include fatigue, weakness, numbness or tingling in the hands and feet, difficulty walking, memory issues, and anemia

Vitamin B12 (cobalamin) injections are a form of intramuscular or subcutaneous therapy used to treat vitamin B12 deficiency

Rebound hunger occurs with appetite-suppressing medications when the brains hunger-regulating neurons, which have been pharmacologically suppressed, suddenly regain activity upon drug cessation

What are the benefits of taking B12 supplements

"Systematic review and pragmatic clinical approach to oral and nasal vitamin B12 (cobalamin) treatment in patients with vitamin B12 deficiency related to gastrointestinal disorders"

Association of vitamin B 12 , folate, and homocysteine with COVID-19 severity and mortality: a systematic review and meta-analysis