Evaluation of sunscreen efficacy over time and re‐application using hybrid diffuse reflectance spectroscopy

• Published in: Photodermatology, photoimmunology & photomedicine Vol. 36; no. 3; pp. 192 - 199
• Main Authors: Ruvolo, Eduardo, Aeschliman, Lisa, Cole, Curtis
• Format: Journal Article
• Language: English
• Published: England 01.05.2020
• Subjects: hybrid diffuse reflectance spectroscopy; re‐application; sun protection factor; sunscreen; sunscreen; hybrid diffuse reflectance spectroscopy; re-application; sun protection factor

Background In 2007, the FDA added requirements for sunscreens to be labeled “re‐apply at least every 2 hours” based on very limited data. This study used hybrid diffuse reflectance spectroscopy (HDRS) to evaluate the persistence of protection by 80 minutes water‐resistant sunscreen formulation with...