Bio Immune Defense delivers the ultimate Immunity defense boost. It contains Vitamin C, Zinc, and a proprietary extract of Echinacea and Elderberry for maximum immune protection on both a short term and long term basis. This is perfect for colds and flu season or when traveling, when around others who are sick, when you need extra protection against germs and viruses, or when you are under excess stress, thus taxing your immune system. Vitamin C has long been known for its tremendous immune protection benefits. Zinc enables the body to more effectively utilize Vitamin C and also can kill rhinoviruses on contact. Elderberry and Echinacea have long been known for their powerful immune system enhancing properties. In this highly absorbable, fast acting spray, you receive the synergistic impact of all of these immune enhancing all star ingredients in one easy to use formula.