PureDefense w/NAC

Natural killer cells, critical white blood cells that science calls NKs, are part of the bodys innate, or first-line, immune response. NKs respond more quickly than your adaptive immune systems 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.