Scientists have suggested that vitamin A may act as an anti-SARS-CoV-2 regimen. Vitamin A has exhibited pharmacological activity in the management of pneumonia. The effective treatment of vitamin A is limited, vitamin A may act as a potent treatment option for COVID 19. Vitamin A has potent physiological functions, including promoting growth and reproduction and maintaining bone, epithelial tissue, vision, and normal secretion of mucosal epithelium. Seven core targets of vitamin A have been identified against COVID 19, including MAPK1, IL10, EGFR, ICAM1, MAPK14, CAT, and PRKCB. It has been reported that vitamin A can improve the ability of immune cells to produce antibodies and induce T lymphocytes to release functional lymphokines. Vitamin A was earlier reported to play a significant role against pneumonia and has also been considered to be a potential clinical treatment for SARS-CoV-2 infection. 

Resource: Li R, Wu K, Li X, Liang X, et al. Revealing the targets and mechanisms of vitamin A in the treatment of COVID 19. Aging. 2020; 12: 15784-15796.