To Maintain a Normal Immune System Liquid Dietary Supplement Immune Gluten Free Lactose Free Non-GMO FSC Certified Certified Swiss Quality Sambu No matter how carefully you handle your health, it might not be enough. Normal immune function can be weakened by many factors in life, like stress, lack of sleep, allergies and the time of year. It's important to give your immune system the support it needs, so we created Sambu - our tried and tested formula designed to support normal immune response. With the beneficial properties of Elderflower and Elderberry, Sambu is the ideal supplement you want in your medicine bag for boosting your immune system and protecting your body during cold and flu season. Pure & Natural, Guaranteed We enjoy strong partnerships with our local farmers and suppliers. And while you'll find Dr. Dünner in over 20 countries, all essential stages of production take place in Switzerland. This means you can trust that the herbs you're taking didn't have to travel very far, from plant to product. All of our packaging is FSC-certified.