Tri-Immune Boost is a power packed immunity blend made up of Glutathione, Ascorbic Acid, and Zinc. This high concentration blend of immune boosting essentials is the ultimate immune system enhancer to help maintain a healthy immune response. Ascorbic Acid supports cellular functions of both the innate and adaptive immune system. Zinc Sulfate plays a role in the development + function of immune processes. Glutathione protects host immune cells + provides optimal functioning of other cells in the immune system.