Lierac Sebologie Stop Spots Concentrate targets blemishes and residual marks. This concentrate contains two distinct phases to maximise the synergistic efficacy of each. Its formula works thanks to several active ingredients inspired by the resurfacing technique: Zinc gluconate which offers an action on the shine and an action on the dilated pores. Salicylic acid which offers an action on the spots and residual marks. The azelaic acid grafted which offers an action on the spots.