17 October 2025
Celtic sea salt
Celtic sea salt is manually extracted according to a traditional Celtic method, more than two thousand years old, in the Guérande region of Brittany, France.
Water from the cold sea current of the Atlantic Ocean is channelled through an ingenious system of channels into shallow clay marshes. The acid clay in these marshes neutralizes to some extent the highly alkaline seawater. Seawater naturally has a sodium content of 97 to 99%. The contact of the Atlantic seawater with the bottom of the Celtic clay marshes (this explains the gray color of the salt), reduces the sodium content to just below 90%. This is the lowest percentage of sodium of any existing sea salt. Moreover, the sea salt mixes with the clay minerals.