Nutritional supplements are controversial, because in many cases, there is not enough research to substantiate the claims being made. When it comes to respiratory illnesses, such as COVID-19, there are a few supplements that may be helpful. In particular, zinc and vitamin C have substantial research supporting their efficacy in helping with certain respiratory illnesses.

In most studies, the effects of zinc have been best seen when delivered through a lozenge, but we haveStudies support the use of a zinc lozenge40 mg a day