Biotherapy Clinic.com. Karlovy Vary Mineral Water. The healing mineral water made from genuine Karlovy Vary thermal spring salt is a natural mineral supplement used in Europe since 1764. Today, Karlovy Vary Healing Mineral Water (KVHMW) is still helping millions of people with various health problems and is used as a preventive remedy.The salt is 100% natural and contains the same minerals and microelements as the Karlovy Vary spring itself. All that is needed to produce mineral water identical to the original is to dissolve the salt in warm water.