Borage is a large plant with blue, star-shaped flowers found throughout Europe and North Africa.
The plant's seeds, flowers and leaves are used for medicinal purposes. PGE1 has anti-inflammatory properties and may also act as a blood thinner. The use of borage can be traced back to the ancient Greeks and Romans, where it was used as a sedative. Throughout the Middle Ages, borage leaves soaked in wine were used to relieve the symptoms of melancholy. Borage oil is used most commonly to treat arthritis and certain skin conditions.