Vitamin D
Vitamin D acts as a hormone, that may be synthesized by the sunlight through the body to enhance immune cells and maintain bone integrity[23]. Vitamin D is considered as a safe strategy to protect from respiratory viruses and increase the antiviral defenses. vitamin D low levels may modulate the expression as (chemokines, interferon, tumor necrosis and proinflammatory cytokines). COVID-19 infected patients almost might have an unsatisfactory vitamin D level. As a result, vitamin D might act as an additional beneficial choice for coronavirus treatment by getting (10 μg) as a supplement daily[24].