Concentrated magnesium source. Epsom Normbio salt is composed of pure magnesium sulfate crystals. We obtain our EPSOM salts through processes that ensure the natural crystallization of the salts, which allows us to offer a product of higher quality. 100% pure. Our Epsom salt is free of additives, preservatives and dyes. It does not contain synthetic fragrances or chemical elements harmful to health. High solubility. The size of the salt crystals has been carefully selected so that they dissolve easily, thus ensuring their traditional use as bath salts in flotation therapies, immersion baths and natural cosmetics treatments.