
"Sunscreens fail in less than two hours of sunlight," stated Bob Sayre, Ph.D., of Rapid Precision Testing Laboratories, citing a previous Cosmetics & Toiletries article and other research. Why? He said it begins with some assumptions.
"Sunscreens fail in less than two hours of sunlight," stated Bob Sayre, Ph.D., of Rapid Precision Testing Laboratories, citing a previous Cosmetics & Toiletries article and other research. Why? He said it begins with some assumptions.