Which sun protection shall one choose? Which SPF? In a sunscreen or in a moisturizing care with an SPF? Why are they so many messages about “anti-sun prevention”? What are the impacts on vitamin D? … Many questions when the topic is sun protection. The first Cosmetic Days Convention, organized by the French Cosmed, held in Marseille (France) on December 6 and 7, 2012, has allowed for the answering to many of these questions.