What type of current does galvanic therapy utilize?

Galvanic therapy employs direct current, which is a continuous flow of electric charge in one direction. This type of current is important in esthetics as it facilitates various skin treatments, including iontophoresis, where active ingredients can be infused into the skin utilizing electrically charged particles. The use of direct current allows for the delivery of a consistent and uninterrupted electrical charge, which enhances the efficacy of certain topical treatments, improves circulation, and can aid in reducing the appearance of fine lines and wrinkles.

In contrast, alternating current, high frequency current, and thermal currents differ greatly in their applications and effects on the skin. Alternating current changes direction periodically, which is typically used in different types of electrical therapies, but not in galvanic methods. High frequency current, on the other hand, is mainly used to generate heat and stimulate tissue, rather than delivering ionic products into the skin. Thermal current would imply the generation of heat without the same benefits associated with ion movement, which does not align with the principles of galvanic therapy. Thus, direct current is the correct answer specifically because of its unique properties that make it suitable for the intended therapeutic effects in esthetics.