SPF testing an "accurate reflection" of ingredient photostability -- CTFA rep.
This article was originally published in The Tan Sheet
Executive Summary
SUNSCREEN SPF TESTING ACCURATELY REFLECTS INGREDIENT PHOTOSTABILITY, CTFA said, noting photostability has been a concern raised often with the introduction of more technically advanced UVA sunscreen ingredients such as microfine zinc oxide, microfine titanium dioxide and avobenzone. James Johnson, PhD, University of Tennessee-Memphis College of Pharmacy, speaking on behalf of the Cosmetic, Toiletry & Fragrance Association at a June 3 FDA "feedback" meeting on sunscreens, maintained the current SPF testing method provides "an accurate reflection of the performance of the product."