Clinical Strength Magnesium Chloride Brine From the Ancient Zechstein Sea Optimal Health No Animals Were Used to Test This Product Discussion: AllVia Magnesium Gel contains magnesium chloride mined from the Ancient Zechstein Seabed of The Netherlands, which lies deep below the Earth's surface. The highly concentrated gel form allows for convenient and precise application to the skin. AllVia Magnesium Gel contains no perfumes, dyes or parabens and is virtually odorless.