Electrotherapy is said to enhance the action of skin-care products. The best-known electrotherapy method is called Cathiodermie and was established in the 1960s. It involves two types of low-voltage current being applied with tiny fork-like electrodes. Galvanic current ionizes both skin and gels, improving absorption. High-frequency faradic current massages the skin's surface, boosting circulation and producing anti-bacterial ozone.