Flowers of elderberry are famous for protecting and strengthening the mucous membranes of the respiratory tract. They also strengthen the immune system, have a diuretic effect, stabilize the blood circulation, relieve pain, and reduce skin inflammation and blood pressure. Substances that are contained in elderberry flowers include: essential oils, flavonoids and choline. Additionally, the flowers are rich in vitamins and minerals, beta-carotene, vitamins A, B1, B2, B3, B6, C, potassium, calcium, magnesium, sodium, phosphorus and sodium.