Most users should start with the lowest concentration to minimize "retinization"—a period of redness, peeling, and irritation. All About Retinoids / How to Get Started Guide
Retinoic acid is the "active" form of Vitamin A that your skin uses directly. Other forms, like retinol, must be converted by your skin into retinoic acid, making them gentler but slower to show results. buy retinoic acid
Often prescribed as Tretinoin (e.g., Retino-A ) to unclog pores and reduce inflammation. Most users should start with the lowest concentration
