What is an example of low level direct current used in facials?

Galvanic current is a specific type of low-level direct current that is commonly used in facials to enhance skin treatment. This form of electrical current is beneficial because it helps in the penetration of products into the skin, enhancing their effectiveness. It works by creating a chemical reaction in the skin, which can help to deep cleanse, hydrate, and rejuvenate the skin.

The process hinges on the principle of iontophoresis, where active ingredients in skincare products can be ionized and introduced into the skin using the electric charge. This can aid in the treatment of various skin concerns, including acne, dehydration, and signs of aging.

In contrast, the other options refer to different technologies and methods not categorized as low-level direct current used in facials. For instance, microdermabrasion is a physical exfoliation technique, ultrasound utilizes sound waves for skin treatments, and infrared therapy uses heat and light for deeper tissue therapy rather than direct current. Thus, galvanic is clearly associated with low-level direct currents specifically for facial treatments.