What type of current is referred to as a constant strength used in beauty therapy?

The type of current referred to as having a constant strength used in beauty therapy is galvanic current. This direct current is characterized by its steady flow in one direction, which creates a consistent, uniform effect on the tissues. In beauty therapy, galvanic current is often used for various treatments, such as iontophoresis, where it helps in the introduction of therapeutic substances into the skin, and for muscle stimulation.

Galvanic current's ability to maintain a constant strength makes it particularly beneficial in treatments that require precision and stability, as varying current strength could affect the efficacy and safety of the therapy. By providing a controlled application, practitioners can achieve their desired outcomes, such as improved skin tone, enhanced circulation, and effective penetration of active ingredients.