Contains many biologically active substances, vitamins, minerals and mineral compounds, organic acids, as well as fatty acids and essential oils, resins and tannins. Black elderberry juice has astringent, diuretic, generally restorative and mild antiseptic properties. It is used in folk medicine as a remedy for colds, sore throats, dry cough and flu. It reduces fever, encourages sweating, stimulates the immune system and loosens sputum. It helps in the treatment of kidney diseases, furunculosis, arthritis, diabetes, gout and rheumatism. It acts as an analgesic and helps with diseases of the nervous system.