To what depth should galvanic treatment be limited on the face?

• A. 0.5
• B. 1.5
• C. 2.5
• D. 3.0

Answer: (B)

Galvanic facial work relies on direct current to move ions into the skin (iontophoresis). To keep it safe and effective, the current should stay within the superficial layers of the skin. Limiting penetration to one and a half millimetres ensures the active ions reach the necessary superficial dermal area without venturing into deeper tissues where nerves, vessels, or other structures could be injured. Deeper penetration—toward two and a half or three millimetres—increases the risk of burns, irritation, or discomfort and isn’t necessary for the desired ionic delivery on the face. The shallower option might be insufficient for some ions to be delivered effectively, so one and a half millimetres strikes the right balance between efficacy and safety.