@thuytien_x: My skin is super picky with active ingredients and besides from those in toner pads I do not use any. I started testing out Azelaic acid since I got it sent home as a gift and after the whole summer of testing it I have got to say it’s amazing!! My skin has never been able to handle active ingredients let alone a serum like this but azelaic acid is very gentle on my sensitive skin. I don’t use it all the time but since my skin has been acting up lately I started using it again 🫶 Products mentioned: • Nineless A-Control Azelaic Acid Serum #koreanskincare #clearskin #koreanskincareproducts #koreanskincaretips #koreanskincareroutine #kbeauty #acne #acnetreatment #acneskin