Beurre d'Isigny is a type of cow's milk butter made in the Veys Bay area and the valleys of the rivers running into it, comprising several French communes surrounding Isigny-sur-Mer and straddling the Manche and Calvados departments of northern France. The butter has a natural golden colour as a result of high levels of carotenoids. The butter contains 82% fatty solids and is rich in oleic acid and minerals salts (particularly sodium). These salts provide flavour and a long shelf-life.