Salts refer to a range of water-soluble, usually inorganic or organic solid molecules designed to be added to your bath.Bath salts benefit your skin in more ways than one. When used in their natural or pure form — they contain minerals and nutrients that keep your skin soft, smooth and supple. Bath salts contain magnesium, calcium, potassium, bromide and sodium. These minerals are easily absorbed in your pores and are known to cleanse and purify your skin, improving its radiance, texture and tone.