Convenient zinc chewable tablet for healthy immune function These statements have not been evaluated by the Food & Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. | Zinc plays an important role in immune function, including supporting the bodys natural defense system.. It is a cofactor in over 300 enzymes and many biological processes, including DNA and protein synthesis, regulation of gene expression, neurotransmitter synthesis, and nutrient utilization. These statements have not been evaluated by the Food & Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.