Elderberry (Sambucus nigra) is used to treat colds, flus, and allergies. It remove mucus from the respiratory system and boost the immune systems.  Anti-influenza, anticancer, antioxidant, anti-inflammatory, and antiviral properties.
Research has confirmed that it stimulate glucose metabolism, and the secretion of insulin, lowering blood sugar levels. Its high vitamin A content make it great for skin health.