What strength of benzoyl peroxide should I use?

Maximum-strength 10% formulas like the Neutrogena Rapid Clear and Amazon Basics gels act fastest but are the most drying. Reviewers with sensitive or reactive skin frequently prefer the gentler 2.5% Neutrogena On-The-Spot, and clinical guidance generally holds that lower concentrations can be nearly as effective with less irritation. Start low if you're prone to dryness or peeling.