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Vit A, an essential vitamin, is also studied for COVID-19 along with other nutrients such as selenium, zinc, Vit D, and Vit E. Research studies reported that low serum Vit A is associated with a higher risk of COVID-19 mortalities, symptoms severity, and delayed recovery [44]. However, optimal supplementation of Vit A, combined with standard treatment and nutrient like Vit D, etc. help reduce the risk of death, need for hospitalization, shorten the duration of symptoms, inhibit SARs-CoV-2 replication (in lab studies), suppress inflammation, preserve respiratory epithelial integrity and help prevent disease progression

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