Salt contains elements essential to life. Iodine, calcium, magnesium, potassium, sodium, iron, selenium and copper are just some of the microelements whose lack or shortage in the body can lead to serious problems with physical and mental health. For example, the selenium contained in salt has a huge impact on halting the skin ageing processes. This is why treatments involving selenium-saturated salt solutions are included in the offering of Polish health resorts and health and beauty centres. Such caves can be found at many Polish health resorts.
Examples include: