Time to Enhance Immunity via Functional Foods and Supplements: Hope for SARS-CoV-2 Outbreak

Coronavirus disease 2019 (COVID-19) is a recently emerged pandemic caused by a novel virus known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This disease is communicable and mainly affects the respiratory tract. The outbreak of this disease has greatly influenced human health and economic activities worldwide. The absence of any medication for this infection highlights the urgent need for the development of alternative methods for managing the spread of the disease. Our immune system operates based on a complex array of cells, processes, and chemicals that continuously protect our body from invading pathogens, including viruses, toxins, and bacteria. The present study was conducted to perform a comprehensive review of all dietary treatments for boosting immunity against viral infections. No study was found to explicitly support the use of any healthy foods or supplements to protect against COVID-19. However, this study offers details on well-researched functional foods and supplements that typically improve the immune response, which could be helpful against this newly emerged pandemic.