The frequency of applying glycolic acid to facial skin is a crucial determinant of both efficacy and safety. This consideration directly impacts the skin’s ability to tolerate the exfoliation and regeneration process induced by the alpha-hydroxy acid (AHA). For instance, a concentration of 10% glycolic acid might be applied once or twice per week for individuals with resilient skin, while those with sensitive skin might require a less frequent application, such as once every two weeks, or a lower concentration.
Appropriate application frequency is paramount to realizing the benefits of glycolic acid, including improved skin texture, reduced appearance of fine lines and wrinkles, and diminished hyperpigmentation. Historical usage, predating modern formulations, involved weaker acid solutions derived from natural sources, necessitating more frequent application. Today, potent formulations require judicious usage to avoid irritation, redness, and potential damage to the skin’s protective barrier.
