The salt pans of the Guérande Peninsula are one of the last places for the artisanal extraction of salt in France. During the very long and very slow route through the maze of basins, the seawater concentrates into ‘Eaux-Mères’. After the salt extraction season, the remaining ‘Eaux-Mères’ (concentrated raw seawater) is extracted: traditionally used as a care product, it is rich in magnesium and contains trace elements and mineral salts naturally present in the ocean. The ‘Eaux-Mères’ is then filtered to remove as much sodium as possible. This is called ‘desalination’ (removal of sodium) and is a cold technique in which no chemicals are used. Magnesium from ‘Eaux-Mères’, naturally concentrated by sun and wind, is an unprocessed marine extract that provides a natural source of biologically absorbable magnesium.
