Natural killer cells, critical white blood cells that science calls NK’s, are part of the body’s innate, or first-line, immune response. NK’s respond more quickly than your adaptive immune system’s B cells and T cells. Once activated, natural killer cell activity peaks in as quickly as several hours, providing rapid support and wide-range immune defense.‡

We also included NAC for antioxidant protection and healthy respiratory function. Additional ingredients like quercetin and elderberry provide flavonoids for immune and respiratory function, while vitamin C, D and zinc play important roles in immune cell activation.‡

• Supports first-line immune defense and upper respiratory health‡
• Includes NAC to promote antioxidant protection for healthy respiratory function‡
• Delivered in a convenient travel pack for short-term dosing