Negative health effects of excessive use of vitamin D, vitamin C and zinc as food alternatives to prevent COVID-19

Covid-19 is one of six viruses belonging to human, leading to mild to severe respiratory diseases. During Covid-19 pandemic, good and balanced food is crucial before, through and after exposure to the virus, because there is in fact no particular food that prevents infection. A review article on the excessive use of vitamin C, D and Zinc as antiviral agents against COVID-19 was prepared and written during the global pandemic of the virus after the phenomenon of increased people’s consumption of vitamins and other supplements to prevent infection, after collecting information from various articles and scientific research published during 2020 through various search engines, from July 15 to August 25. In conclusion, there is not enough scientific evidence to give high doses of vitamin C or vitamin and zinc to prevent infection with the Covid-19 virus. Vitamin C is safe when used in high doses, but Vitamin D has toxic effects if the daily dose exceeds 50,000 IU and zinc can be fatal if the dose exceeds 10-30 gm.