What is one of the primary effects of iontophoresis?

Iontophoresis is a treatment that utilizes a small electrical current to introduce active substances into the skin. This technique effectively enhances the penetration of these active ingredients, making it particularly useful for delivering water-soluble products that may not easily absorb through the skin barrier on their own. Through the application of this electrical current, the charged particles of the active substances are propelled into the skin, which can help improve various skin concerns such as hydration, pigmentation, and overall texture.

In contrast, stimulating muscle contraction is more associated with electrotherapy techniques that aim to strengthen or tone muscles rather than introducing substances. Reducing skin temperature may occur due to various cooling treatments or modalities but is not a primary effect of iontophoresis. Increasing skin laxity suggests a weakening of the skin's structure, which is contrary to the intended effects of iontophoresis that typically aim to improve skin firmness and texture by providing beneficial ingredients.