Source Naturals Wellness Immune Chewable is a great tasting berry flavored dietary supplement that is designed to support your immune defense when you need it most: the cold weather season! A powerful herbal-nutrient blend -- including echinacea, elderberry, astragalus, marshmallow root, mushroom extracts, and zinc -- is combined with advanced special ingredients such as beta glucan and transfer factor. Wellness Immune Chewable is carefully formulated to address the body's intricate immune system by various biological pathways.