Eucerin dermopurifyer active night care night care with lactic acid for oily and blemish prone skin eucerin dermopurifyer active night care improves skin complexion by helping to unclog and purify pores overnight eucerin dermopurifyer active night care is a highly effective oil free formula containing lactic acid its follicle targeting system delivers lactic acid continuously throughout the night opening the comedones and supporting the skin8217s own regeneration applied every evening