Elderberry helps relieve symptoms of cold and flu. Powerful formula made with only one ingredient: Elderberries grown in Canada whose cultivars have been selected for their highest levels of antioxidants. To achieve concentration of 5:1 a portion of the juice is freeze dried. 1tsp of concentrate is made from 5tsp of fresh elderberry. Can be used year-round. Mandatory refrigeration once opened. 18 months of storage unopened, 30 days once the bottle is open. To keep longer than 30 days by making ice cubes that contain the desired amount of concentrate and add enough water.