Effaclar clarifying lotion cleanses and exfoliates the skin to help instantly unblock and reduce the appearance of pores effaclar is the complete solution adapted for all types of imperfection prone skin naturally hyperactive sebaceous glands produce an excess amount of sebum the skin tends to become shiny under the influence of environmental variations sebum can oxidise and stimulate sebaceous glands even more the pores get blocked and imperfections may appear la roche posay is