Natural Living From The Ancient Zechstein Seabed Exfoliates, Detoxifies & Moisturizes Optimal Health 1st Choice Magnesium Body Scrub has a high concentration of pure magnesium chloride mined deep from under the earth's surface from the Zechstein Sea in the Netherlands. Easy to apply, exfoliates, detoxifies, and moisturizes the skin leaving it feeling relaxed and with a fresh, health glow.