Understanding contact time in acne treatment: when leave-on products work better and when wash-off may be preferred. This page is part of the Skin Health hub on Evidence Before Claims. Content is for educational purposes only and is reviewed against peer-reviewed studies, FDA labeling, and current clinical guidelines. It does not provide diagnosis, treatment, or individualized
Reviewed by Amelia Ross, MD (illustrative reviewer) — MD, Dermatology. Last reviewed: May 2026. Educational content only; not medical advice.