Airborne Plus Beta-Immune Booster provides immune support in a great-tasting Zesty Orange flavored powder. Simply dissolve the contents of one packet into 4-6 ounces of water, stir well and drink. The Beta-Immune Booster (from Dried Yeast Fermentate) supports key immune activity to help your immune cells work at their best*. Each packet also contains a specially crafted blend of vitamins and minerals to boost your natural defenses*. Contains 500mg of Vitamin C and High in Antioxidants (Vitamins A, C & E). Also is an excellent source of Zinc & Selenium.