La Roche Posay - Effaclar Serum Effaclar anti-aging serum exfoliates skin, tightens pores and visibly smoothes skin texture. It boosts the skin's radiance and visibly reduces the appearance of fine lines and wrinkles for clearer, younger-looking skin. It has been tested on oily and acne-prone sensitive skin. Its ultra-fluid and non-greasy light gel texture is quickly absorbed into your skin.