Immune Essentials by Xymogen features Whole Beta Glucan particles, Olive Leaf extract and Vitamin C to support the body’s innate defenses against acute immune challenges like the cold and flu virus. In clinical trials, purified 1,3/1,6 Beta Glucan significantly reduced the number of days with immune distress. The olive leaf extract in this formula inhibits the growth of microbes by stimulating the immune system’s defenses, while vitamin C adds healthy antioxidant support. At the onset of symptoms, take 3 capsules twice a day and repeat as needed.