KEYWORDS: In vivo SPF, claiming, variability, sunscreen products, sun protection.
ABSTRACT: This work attempts to compare the labeled SPF (Sun Protection Factor) afforded by 60 different sunscreen products from the European market in comparison with the in vivo SPF measured using international standard based on data published in a safety report. Using a statistical approach, it was demonstrated that in some cases, a significant difference appears between the both SPF values (i.e. labeled and measured) which could lead to be a shortcoming for consumer health and any further correlation with other SPF method.

INTRODUCTION
It’s around the 60’s that for the first time the concept of sunstroke control as a scale allowing longer sun exposure before sunburning was introduced throug, the so called and now well-known Sun Protection Factor (SPFd. it was the only existing iniee proposed and became a worldwide standard for classification of the UV protection efficiency of the sunscreen products unless limited to a single biological reaction (sunstroke) and caused by a ...