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As shown in the Figure above, at the end of a month, weekly nasal administration results in significantly higher serum Vitamin B12 levels than after intramuscular administration

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Treatment of Pernicious Anaemia Consuming B12-rich foods and supplements is very helpful in increasing Vitamin B12 reserves in the body

32 , 33 Given that vitamin B 12 is involved in various functions in the body and is influenced by several clinical conditions known to be at risk, depending on the outcomes of COVID-19, identifying vitamin B 12 status is necessary for patients with current COVID-19 infection and those who have had COVID-19