Our NK Cell Activator™ supports the activity of natural killer (NK) cells to promote a healthy immune response and provide targeted seasonal immune protection. Natural killer (NK) cells function as the body's first responders and provide your body’s first, immediate response to previously unknown immune challenges. Because of their nature, encouraging NK cell activity is imperative as we age and is especially important during the winter season. NK Cell Activator™ contains 500 mg of a proprietary blend of modified rice bran to strengthen the activity of NK cells with just a few months of use each year. NK cell activity provides protection against seasonal immune challenges for real-world immune support. NK Cell Activator™ Benefits: Supports the activity of natural killer cells, Helps protect against seasonal immune challenges, Encourages functional activity of natural killer cells to support the immune system.