Formulated with immune system boosting mistletoe extract, these Defence drops from Formulated with immune system boosting mistletoe extract, these Defence drops from. also contain echinacea, eleuthero, rosemary, and schisandra berry to help level-out cortisol levels and fight the symptoms of illness. Each alcohol-free drop contains potent anti-bacterial benefits and can be taken directly under the tongue for fast absorption or added to water.