Not knowing the difference between regular and clinical strength
Regular antiperspirants must show a 20 percent reduction in sweat duct plug formation, while clinical strength must show a 30 percent reduction. “Clinical strength antiperspirants contain a higher concentration of aluminum zirconium salts, and although they may be more effective, they may also be more irritating,” says Dr. Frey. “I advise my patients with sensitive skin to avoid antiperspirants with fragrance as well as extra strength formulas, and to look instead for products that contain dimethicone, which may also prevent irritation in susceptible individuals.”