The natural brine is extracted in Bad Windsheim (Bavaria) from a depth of around 200 meters, where it lies in the form of a salt deposit approximately twelve meters thick. When the brine reaches the surface, it has a concentration of 26.9%. It is enriched with valuable minerals and trace elements and is primarily used for skin conditions such as acne, atopic dermatitis, and psoriasis. However, due to its high sodium chloride content, it can also serve as a mineral-rich alternative to table salt.   To harness the minerals for the skin, a salt concentration of just 1–5% in the water phase is sufficient (meaning the brine is diluted by at least 1:5).   For most inflammatory skin conditions, concentrations of 5–27% are used—potentially even undiluted natural brine. At high concentrations of 20% or more, the brine reduces calluses or causes them to slough off, acting as an exfoliant without abrasive particles. Since baths require relatively large quantities, the brine can also be mixed with xanthan gum to form a gel for topical application. However, when using high concentrations, please leave it on for only about 30 minutes before rinsing off with warm water; the skin should retain some of its natural callus layer. It is best used like a bath treatment or a mask. Naturally, concentrated salt water should not be applied near the eyes.   Usage concentration:  5–100% pure brine