Galvanic electrolysis uses what kind of current?

• A. Direct current that flows in one direction.
• B. Alternating current that reverses direction.
• C. No electrical current.
• D. Pulsed current that reverses polarity.

Answer: (A)

Direct current that flows in one direction is used in galvanic electrolysis. The steady, unidirectional polarity drives an electrochemical reaction at the needle tip, producing alkaline byproducts (such as sodium hydroxide) in the surrounding tissue. This chemical change damages the hair follicle and papilla so the hair cannot regrow. If the current reversed direction or alternated, the necessary sustained chemical reaction wouldn’t form, and the method wouldn’t work the same way. No current means no electrolysis at all, and a pulsed current that reverses polarity would interrupt the continuous chemical action galvanic relies on.