Natural Factors Immune Support Black ElderberryNatural Factors Black Elderberry features ElderCraft black elderberries hand harvested in Austria and extracted using a unique solvent free process. Elderberries are a source of antioxidant anthocyanins, polysaccharides, and other beneficial micronutrients. They are traditionally used in herbal medicine to help relieve symptoms of cold and flu. Helps relieve fever associated with the common cold and flu, as used in herbal medicine Traditionally used