Elder flower, also known as Sambucus nigra, is a perennial shrub native to Europe, Asia, and North America. The flowers of the plant are used for medicinal purposes. Elderflower has been traditionally used to help relieve symptoms of colds, flu, and other upper respiratory infections. It is believed to have anti-inflammatory and antiviral properties. It is also traditionally used to help improve digestion, reduce inflammation and to help alleviate symptoms of allergies. It is also believed to have diuretic properties and may help to reduce water retention and to help detoxify the body.