New Jersey State Board Esthetics Practice Exam

Which of the following is the only direct current used in skincare?

1. Sinusoidal current

2. Galvanic current

3. High frequency current

4. Microcurrent

The correct answer is: Galvanic current

Galvanic current is the only direct current used in skincare treatments. This type of current has a steady flow of electricity that can be used to facilitate various procedures in esthetics, such as iontophoresis, which involves the introduction of products into the skin using an electric current to enhance absorption. The application of galvanic current allows for the delivery of active ingredients and helps with chemical reactions in the skin. For instance, it can help to soften the skin, improve penetration of skincare products, and can also aid in tissue repair and rejuvenation. In contrast, sinusoidal current is an alternating current that produces a series of sinusoidal waves, high-frequency current consists of high-frequency alternating current that generates thermal and electrical energy, and microcurrent is a very low level of electrical current used primarily for muscle re-education and skin tightening, but not classified as direct current. Understanding these distinctions helps in recognizing the specific applications and benefits of each type of electrical current in skincare practices.