100% PureFrom the Ancient Zechstein Seabed Highly Concentrated Condition: Skin in need of softening and hydration.Solution: NOW® Solutions 100% Pure Magnesium Chloride Flakes are an ideal natural bath additive for softening skin. Derived from the ancient Zechstein seabed in the Netherlands, one of the world's purest remaining subterranean mineral sources, our pure magnesium flakes have traditionally been used to improve skin hydration, and make a soothing addition to bath water and foot baths. One cup of flakes contains approximately 19 grams of elemental magnesium. Suggested Use: Foot Bath: Dissolve 1 cup of approx 1 gallon of warm water. Soak 20-30 minutes.Full bath: Dissolve 4 cups in bathtub filled with warm water. Soak 20-30 minutes. Rinse and pat dry.