Tri-immune boost intramuscular injection is composed of glutathione, zinc sulfate, and ascorbic acid. Glutathione is an amino acid, and is a powerful antioxidant that is essential to immune defense. It protects host cells and provides optimal lymphocyte function. Zinc is an important mineral that helps fight infections, and aids in wound healing. Ascorbic acid is a strong antioxidant, which supports various cellular functions of the innate and adaptive immune system.