Magnesium chloride hexahydrate (MCH) is chemically/laboratory produced. Our Magnesium Chloride topical magnesium products are ‘wildcrafted’. That means, they’re taken directly from salt evaporation ponds. Hexaydrate means “without water” and when MCH topical brands make magnesium spray, cream or “oil”, they rehydrate these lab-produced magnesium flakes. MCH only includes magnesium chloride without the 90 naturally-occurring trace minerals found in our wildcrafted magnesium chloride from seawater. We believe that many of these trace minerals are also transdermal and beneficial to our health.