A Truly Premium Therapeutic Bath Additive Choose from 3 or 6 lbs of 100% pure magnesium chloride flakes, sourced directly from the Dead Sea. Rapha Blends Magnesium Flakes contain the highest concentration of magnesium chloride (47%) available on Earth. Scented options consist of organic essential oil(s). No toxic or endocrine disrupting chemicals of any kind. Experience true transdermal magnesium when you bring the "Salt Sea" to your bath at home. Why Should You Soak? Magnesium is an essential mineral that supports many important functions in the body, including muscle and nerve function, heart rhythm, and the regulation of blood pressure and blood sugar levels.