Sambucol Black Elderberry Immuno Forte Effervescent Tablets help support the immune system. Black Elderberries contain some of the most potent naturally occurring antioxidants. Sambucol Black Elderberry Immuno Forte Effervescent Tablets can be used throughout the year to help support the immune system. New Sambucol Immuno Forte Effervescent Tablets quickly dissolve in water to make a great tasting natural berry-flavored drink. Sambucol black elderberries provide a natural mode of action called AntiVirin, which protects healthy cells and supports the immune system.