Terranova Elderberry & Olive Leaf blend supports a healthy immune system and protects against oxidative stress. Elderberry is rich in vitamin A & C which helps the immune system work at its best and keep the skin feeling and looking healthy. Terranova\'s formula also contains olive leaf extract, an herbal supplement that has antibacterial and antimicrobial properties. Oleuropein, the main active compound in olive leaf extract has numerous health benefits. Elderberry Fruit Elderberries are a rich source of vitamins A and C, which are crucial in helping the body maintain optimal health. Olive Leaf Olive leaf exhibits considerable immune supportive and antimicrobial activity. Elderflower Elderflower helps maintain respiratory health Ginger Rhizome/Root The activity of ginger root against various infective microbes is well established. Ginger`s warming properties and its common use in supporting healthy sinus function and combating nausea make it a versatile tool in cold season.