Abstract
Zinc is an indispensable trace element required for several critical functions of the human body. Deficiencies of micronutrients can impair immune function and increase susceptibility to infectious disease. It is noteworthy that higher susceptibility to the SARS-CoV-2 viral infection is seen in individuals with micronutrient deficiencies and poorer overall nutrition. Research in the last two decades suggests that one-third of the global population may be deficient in zinc, which affects the health and well-being of individuals of all ages and gender. Zinc deficiency is now considered one of the factors associated with susceptibility to infection and the detrimental progression of COVID-19. The trace element is essential for immunocompetence and antiviral activity, rendering zinc supplements highly popular and widely consumed. Zinc supplements are required in small doses daily, and their absorption is affected by food rich in fiber and phytase. The organic forms of zinc such as picolinate, citrate, acetate, gluconate, and the monomethionine complexes are better absorbed and have biological effects at lower doses than inorganic salts. Considering the present global scenario, choosing the right zinc supplement is essential for maintaining good health. In the present review, we reexamine the role of zinc in immunity and antiviral activity and a comparative account of different forms of zinc supplements.
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