Natreve Immune Strength Dietary Supplement helps maintain and support a healthy immune function with traditional herbal ingredients like astragalus and Reishi mushrooms. It also contains Wellmune, a naturally gluten-free beta-glucan that?s been clinically proven to support your immune system. Non-GMO Project Verified, Informed Sport Certified, gluten-free, vegan and contains no added sugar. Age Group: adult.