Eucerin DermoPurifyer Toner is to be applied daily as part of a cleanse, clear and care routine. Its anti-bacterial formula contains 2% Lactic Acid active system which gently unclogs pores without over-drying, reduces the growth of bacteria (one of the four factors of impure skin) and prevents blemishes. It is particularly effective in the T-Zones and can be used alongside common acne medication.