ORGANIC MAGNESIUM BATH FLAKE PURIFICATION: Magnesium Flakes offer a highly effective, yet muscle calming, means of absorbing magnesium nutrients. Choose between the unmatched benefit of an immersive bathtub full body bath wash, or quicker convenient foot tub bath soak. Research has proven topical magnesium chloride to be a more effective administration method when matched with leading oral supplements. MAGNESIUM CHLORIDE FLAKES VS EPSOM SALT: Bath flakes are made from magnesium chloride. Epsom salts are magnesium sulfate. Although both forms absorb magnesium better than oral magnesium supplements, magnesium chloride is much better suited for topical application. Flake Baths are great for stress relief, sore muscle recovery, improving circulation, headaches, joint pain, restless leg syndrome, cramps, and is a more sensitive application than other transdermal techniques. ONLY THE PUREST & HIGHEST CONCENTRATED MAGNESIUM SOURCES: Genuine Zechstein magnesium chloride is sourced 1500 meters underground in the Zechstein Seabed, 250 Million Years in the Making, this seabed is the purest magnesium source in the world. All Ancient Minerals products are organic, produced from the best raw materials, and formulated in the United States at FDA certified facilities.