Pure Encapsulations, PureDefense w/NAC, 120 vcaps

Enhances first-line immune defense Support for upper respiratory system Quicker immune response with EpiCor dried yeast fermentate complex Hypoallergenic Your immune system has the very important job of defending your overall health. Natural killer cells are part of the body's innate, or first-line, immune response. They respond more quickly than the adaptive immune system comprised of 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.PureDefense with NAC by Pure Encapsulations has been formulated to boost immunity. The active ingredients in each vegetable capsule include:Vitamin C which may boost your immune system's ability to fight off viruses such as the common coldVitamin D which may help activate your immune system causing it to spring into action against invadersZinc which may increase the number of infection-fighting white blood cells in your bodyN-acetyl-l-cysteine (fre