Colorado Esthetician Written Practice Exam 2025 – Comprehensive All-in-One Guide for Exam Success!

The correct answer is C. Galvanic current. Galvanic current is a type of direct current that involves a positive and negative pole and produces chemical changes in the skin. This current is commonly used in esthetic treatments to help penetrate products deeper into the skin and produce certain chemical effects such as desincrustation and iontophoresis.

Option A, Alternating current, involves a current that periodically reverses direction, unlike the constant direction of galvanic current. Option B, Direct current, is a close choice but does not specifically mention the positive and negative poles involved in galvanic current. Option D, High-frequency current, is a different type of current that is known for its thermal and germicidal effects rather than producing chemical changes like galvanic current.