La Roche-Posay research has shown that under the effects of external aggressors (pollutant particles, dust) oily, imperfection-prone skin undergoes oxidation, which can trigger a chain reaction – hyper-keratinisation, sebum hyper-production, oxidation of sebum and impurities present at skin surface. All of which can lead to the formation of new imperfections. Suitable for combination to oily, imperfection-prone skin. Also suitable for sensitive skin.